Piri Keşif Aracı

Özet Ek Bilgiler

Kaydet

The knee and ankle are the two most injured joints associated with the sport of badminton. This study evaluates biomechanical factors between professional and amateur badminton players using an injury mechanism model. The aim of this study was to investigate the kinematic motion and kinetic loading differences of the right knee and ankle while performing a maximal right lunge. Amateur players exhibited greater ankle range of motion ( , ) and inversion joint moment ( , ) in the frontal plane as well as greater internal joint rotation moment ( , ) in the horizontal plane. In contrast, professional badminton players presented a greater knee joint moment in the sagittal ( , ) and frontal ( , ) planes, which may be associated with increased knee ligamentous injury risk. To avoid injury, the players need to forcefully extend the knee with internal rotation, strengthen the muscles around the ankle ligament, and maximise joint coordination during training. The injuries recorded and the forces responsible for the injuries seem to have developed during training activity. Training programmes and injury prevention strategies for badminton players should account for these findings to reduce potential injury to the ankle and knee.

Kaynak 1:

https://www.hindawi.com/journals/abb/2017/5397656/ arayıcılığı görüntüle.
Kaynak 2:

https://doi.org/10.1155/2017/5397656 arayıcılığı görüntüle.

DOI : https://doi.org/10.1155/2017/5397656

Cilt: 2017
ISSN: 1176-2322

Sınıflandırma :

Tıp ve Halk Sağlığı %97

Spor İlacı %100

2

Utility of Body Mass Index, Waist-to-Height-Ratio and cardiorespiratory fitness thresholds for identifying cardiometabolic risk in 10.4–17.6-year-old children

Dergi Makalesi

Kaynak :

Science Direct

Dergi:

Obesity Research & Clinical Practice

Yayıncı:

Elsevier

Yazar(lar) :

Duncan S. Buchan , Julien S. Baker

Yıl :

2017

Julien S. Baker

Özet Ek Bilgiler

Kaydet

Summary Objective To examine the utility of Body Mass Index (BMI), Waist-to-Height-Ratio (WHtR) and cardiorespiratory fitness thresholds to identify cardiometabolic risk in youth. Methods Cross-sectional cardiometabolic risk factor variables on 534 children aged 10.4–17.6 years of age (52% boys) from the United Kingdom were used. Binary logistic regression and receiver operating characteristic curves were used to examine the utility of established age and gender specific thresholds for BMI, WHtR and cardiorespiratory fitness to identify individuals with increased cardiometabolic risk (increased clustered triglycerides, HDL-cholesterol, systolic blood pressure and glucose). Results A WHtR ≥ 0.5 increased the odds by 11.4 (95% confidence interval 4.7, 27.4, P < 0.001) of having increased cardiometabolic risk in boys and by 2.5 (1.2, 5.3, P = 0.020) for girls. Similar associations were observed for BMI and cardiorespiratory fitness in both boys and girls with increased cardiometabolic risk. BMI-z, WHtR and cardiorespiratory fitness all showed a significant ability in identifying individuals for increased cardiometabolic risk in boys and girls (P < 0.05) despite poor area under the curve (AUC) values (<0.70). Combining anthropometrical variables did improve the diagnostic accuracy for identifying cardiometabolic risk in boys, evidenced by an increased AUC of 0.74 (0.64, 0.85, P < 0.001), but not in girls. Conclusion The magnitude of associations was broadly similar for BMI, WHtR and cardiorespiratory fitness in identifying individuals at increased cardiometabolic risk. Yet, combining BMI with WHtR in boys may provide a more accurate method for identifying those at increased cardiometabolic risk.

DOI : 10.1016/j.orcp.2017.01.001

Anahtar Kelimeler : BMI Body Mass Index, Body Mass Index, WHtR Waist-to-Height Ratio, Waist-to-Height Ratio, CRF cardiorespiratory fitness, cardiorespiratory fitness, HDL-c high density lipoprotein cholesterol, high density lipoprotein cholesterol, ROC receiver operator characteristics, receiver operator characteristics, AUC area under the curve, area under the curve, Cardiometabolic risk, Waist-to-Height-Ratio, Body Mass Index, Cardiorespiratory fitness, Children

ISSN: 1871-403X
Sayı: 5
Cilt: 11
Sayfa: 567-575

3

Assessing Cardiorespiratory Fitness of Soccer Players: Is Test Specificity the Issue?–A Review

Dergi Makalesi

Kaynak :

Directory of Open Access Journals (DOAJ)

Dergi:

Sports Medicine - Open

Yazar(lar) :

Monèm Jemni , Mohammad Shoaib Prince , Julien S. Baker

Yıl :

2018

Julien S. Baker

Piri Tam Metin Bulucu Özet Ek Bilgiler

Kaydet

Abstract It is important that players and coaches have access to objective information on soccer player’s physical status for team selection and training purposes. Physiological tests can provide this information. Physiological testing in laboratories and field settings are very common, but both methods have been questioned because of their specificity and accuracy respectively. Currently, football players have their direct aerobic fitness assessed in laboratories using treadmills or cycle ergometers, whilst indirect measures (using estimation of aerobic performance) are performed in the field, typically comprising multiple shuttle runs back and forth over a set distance. The purpose of this review is to discuss the applied techniques and technologies used for evaluating soccer players’ health and fitness variables with a specific focus on cardiorespiratory testing. A clear distinction of the functionality and the specificity between the field tests and laboratory tests is well established in the literature. The review findings prioritize field tests over laboratory tests, not only for commodity purpose but also for motivational and specificity reasons. Moreover, the research literature suggests a combination of various tests to provide a comprehensive assessment of the players. Finally, more research needs to be conducted to develop a specific and comprehensive test model through the combination of various exercise modes for soccer players.

DOI : 10.1186/s40798-018-0134-3

Anahtar Kelimeler : Football, Endurance, Maximal oxygen uptake (VO2 max), Testing, Performance

ISSN: 2198-9761
Cilt: 4
Sayı: 1
Sayfa: 1 - 18

4

HEAD INJURIES IN FULL CONTACT KARATE COMPETITION! IS THE PREJUDICE IN MANAGEMENT MINIMISING THE REQUIRED INVESTIGATION?

Dergi Makalesi

Kaynak :

Directory of Open Access Journals (DOAJ)

Dergi:

Journal of Sports Science and Medicine

Yazar(lar) :

Michael R. Graham , Bruce Davies , Julien S. Baker

Yıl :

2007

Julien S. Baker

Özet Ek Bilgiler

Kaydet

A 33 year old male karate practitioner presented himself for a full-contact national karate competition. This individual competed for approximately 2 minutes and received a kick to the head. He collapsed in the competitive arena, and suffered a tonic-clonic seizure, lasting for 3 minutes 25 seconds. Examination in the competitive arena revealed an individual who was unconscious. First aid, and paramedic support was provided immediately. Medical assessment identified the presence of vital signs. Glasgow coma scale (GCS), post trauma was recorded as 3/15 until the fifth minute. A patent airway was established and a neck brace was applied. Blood pressure within 1 minute of trauma was 195/98 mm.Hg, heart rate was 185 bpm and respiratory rate was 40 breaths·min-1. Oxygen was administered via a ventimask. The patient was conveyed to the medical area. The patient regained consciousness one minute after the seizure had resolved, but had amnesia concerning the event. GCS at five minutes was recorded as 13/15. The patient was transferred by ambulance to the nearest Hospital. The patient was discharged, following examination without further investigation. The finding of this study suggests that an individual with a history of head injury should have received computerised tomography as a minimum investigation. This may help eleviate the risk of further medical complications

Anahtar Kelimeler : Cerebral trauma, computerised tomography, mild head injury, prevention

ISSN: 1303-2968
Cilt: 6
Sayı: Combat Sports 2
Sayfa: 62 - 64

Sınıflandırma :

Tıp ve Halk Sağlığı %97

Anesteziyoloji %65

Travmatik Cerrahi %24

5

Interaction among Skeletal Muscle Metabolic Energy Systems during Intense Exercise

Dergi Makalesi

Kaynak 1:

Hindawi Limited

Kaynak 2:

Directory of Open Access Journals (DOAJ)

Dergi:

Journal of Nutrition and Metabolism

Yayıncı:

Hindawi

Yazar(lar) :

Julien S. Baker , Marie Clare McCormick , Robert A. Robergs

Yıl :

2010

Julien S. Baker

Özet Ek Bilgiler

Kaydet

High-intensity exercise can result in up to a 1,000-fold increase in the rate of ATP demand compared to that at rest (Newsholme et al., 1983). To sustain muscle contraction, ATP needs to be regenerated at a rate complementary to ATP demand. Three energy systems function to replenish ATP in muscle: (1) Phosphagen, (2) Glycolytic, and (3) Mitochondrial Respiration. The three systems differ in the substrates used, products, maximal rate of ATP regeneration, capacity of ATP regeneration, and their associated contributions to fatigue. In this exercise context, fatigue is best defined as a decreasing force production during muscle contraction despite constant or increasing effort. The replenishment of ATP during intense exercise is the result of a coordinated metabolic response in which all energy systems contribute to different degrees based on an interaction between the intensity and duration of the exercise, and consequently the proportional contribution of the different skeletal muscle motor units. Such relative contributions also determine to a large extent the involvement of specific metabolic and central nervous system events that contribute to fatigue. The purpose of this paper is to provide a contemporary explanation of the muscle metabolic response to different exercise intensities and durations, with emphasis given to recent improvements in understanding and research methodology.

Kaynak 1:

https://www.hindawi.com/journals/jnme/2010/905612/ arayıcılığı görüntüle.
Kaynak 2:

https://doi.org/10.1155/2010/905612 arayıcılığı görüntüle.

DOI : https://doi.org/10.1155/2010/905612

Cilt: 2010
ISSN: 2090-0724

Sınıflandırma :

Biyotıp %98

Nörokimya %34

6

Association of Arch Stiffness with Plantar Impulse Distribution during Walking, Running, and Gait Termination

Dergi Makalesi

Kaynak 1:

MDPI

Kaynak 2:

Directory of Open Access Journals (DOAJ)

Dergi:

International Journal of Environmental Research and Public Health

Yayıncı:

MDPI AG

Yazar(lar) :

Xuanzhen Cen , Datao Xu , Julien S. Baker , Yaodong Gu

Yıl :

2020

Julien S. Baker

Özet Ek Bilgiler

Kaydet

The purpose of this study was to determine relationships between arch stiffness and relative regional impulse during walking, running, and stopping. A total of 61 asymptomatic male subjects volunteered to participate in the study. All were classified by calculating the arch stiffness index using 3-dimensional foot morphological scanning. Plantar pressure distribution data were collected from participants using a Footscan pressure platform during gait tests that included walking, running, and gait termination. The stiff arches group (n = 19) and flexible arches group (n = 17) were included in the following data analysis. The results suggested that subjects with stiffer arches had a larger and smaller percentage of plantar impulse in the forefoot and rearfoot, respectively, than subjects with more flexible arches during walking and running. However, during gait termination, which included planned and unplanned gait stopping, the plantar impulse distribution pattern was found to be reversed. The current findings demonstrate that the distributional changes of plantar loading follow unidirectional transfer between the forefoot and the rearfoot on the plantar longitudinal axis. Moreover, the patterns of impulse distribution are also different based on different gait task mechanisms.

Kaynak 1:

http://dx.doi.org/10.3390/ijerph17062090 arayıcılığı görüntüle.
Kaynak 2:

https://doi.org/10.3390/ijerph17062090 arayıcılığı görüntüle.

DOI : 10.3390/ijerph17062090

ISSN: 1660-4601
Sayı: 6
Cilt: 17
Sayfa: 2090

Sınıflandırma :

Tıp ve Halk Sağlığı %77

Spor İlacı %81

7

Assessing Cardiorespiratory Fitness of Soccer Players: Is Test Specificity the Issue?-A Review.

Dergi Makalesi

Kaynak :

PubMed

Dergi:

Sports Med Open

Yazar(lar) :

Monèm Jemni , Mohammad Shoaib Prince , Julien S Baker

Yıl :

2018

Julien S Baker

Piri Tam Metin Bulucu Özet

Kaydet

It is important that players and coaches have access to objective information on soccer player's physical status for team selection and training purposes. Physiological tests can provide this information. Physiological testing in laboratories and field settings are very common, but both methods have been questioned because of their specificity and accuracy respectively. Currently, football players have their direct aerobic fitness assessed in laboratories using treadmills or cycle ergometers, whilst indirect measures (using estimation of aerobic performance) are performed in the field, typically comprising multiple shuttle runs back and forth over a set distance. The purpose of this review is to discuss the applied techniques and technologies used for evaluating soccer players' health and fitness variables with a specific focus on cardiorespiratory testing. A clear distinction of the functionality and the specificity between the field tests and laboratory tests is well established in the literature. The review findings prioritize field tests over laboratory tests, not only for commodity purpose but also for motivational and specificity reasons. Moreover, the research literature suggests a combination of various tests to provide a comprehensive assessment of the players. Finally, more research needs to be conducted to develop a specific and comprehensive test model through the combination of various exercise modes for soccer players.

DOI : 10.1186/s40798-018-0134-3

Anahtar Kelimeler : Endurance, Football, Maximal oxygen uptake (VO2 max), Performance, Testing

8

Novel risk factors of cardiovascular disease and their associations between obesity, physical activity and physical fitness

Dergi Makalesi

Kaynak :

Directory of Open Access Journals (DOAJ)

Dergi:

Journal of Public Health Research

Yazar(lar) :

Duncan S. Buchan , Non E. Thomas , Julien S. Baker

Yıl :

2012

Julien S. Baker

Piri Tam Metin Bulucu Özet Ek Bilgiler

Kaydet

The prevalence of cardiovascular disease (CVD) is increasing around the globe and is the leading cause of death around the world. Though once thought of as an adult problem, it is now recognised that the early manifestations of disease may occur during childhood. Numerous risk factors have been linked to CVD with much of the research focusing on understanding the prevalence and relationship of traditional risk factors such as dyslipidemia, smoking, diabetes mellitus, hypertension, obesity, psychosocial stress, poor diet, physical inactivity and alcohol consumption to the early etiology of disease. While this line of investigation has greatly enhanced our understanding of the relationship between these risk factors and disease, they do not fully explain all cardiovascular events. To enhance our understanding and help with the management of CVD, investigations that involve the measurement of traditional as well as novel risk factors may be necessary. Public health strategies that aim to reduce the prevalence of obesity and overweight encourage youth to increase their physical activity levels as a means of protecting against poor cardiometabolic profiles. Interventions that increase physical activity levels and improve cardiorespiratory fitness cause a reduction in certain CVD risk factors but the lack of agreement between findings makes it impossible to give precise recommendations that will ensure CVD risk reduction. Yet it is important that research continues in order to establish the most appropriate means of improving the health and well-being of those at most risk of future CVD.

DOI : 10.4081/jphr.2012.e11

Anahtar Kelimeler : Cardiovascular Disease, Youth, Physical Fitness, Physical Activity, Obesity

Cilt: 1
Sayı: 1
Sayfa: e11 - e11

Sınıflandırma :

Tıp ve Halk Sağlığı %93

Klinik Beslenme %23

9

Effects of table tennis multi-ball training on dynamic posture control

Dergi Makalesi

Kaynak :

Directory of Open Access Journals (DOAJ)

Yazar(lar) :

Yaodong Gu , Changxiao Yu , Shirui Shao , Julien S. Baker

Yıl :

2019

Julien S. Baker

Özet Ek Bilgiler

Kaydet

Background Prior to the 2017 table tennis season, each participant performed the anterior, posteromedial, and posterolateral the star excursion balance test (SEBT) reach distances in a randomized order. The aim of this study was to assess the effects of table tennis multi-ball training and dynamic balance on performance measures of the SEBT for the male and female. Methods The limb lengths of the 12 table tennis athletes were measured bilaterally in the study. Besides warm-up end, the data of this study were recorded at a regular interval at approximately 16 min for the entire multi-ball training session, and they were defined as Phase I, Phase II, Phase II, respectively. The Borg rating of perceived exertion (RPE) scale was used to document the degree of physical strain. Results Reaching distances showed a decrease with training progression in all directions. Compared with the male table tennis athletes, the females showed poorer dynamic posture control, particularly when the free limb was considered with the right-leg stance toward posterolateral and posteromedial directions in phase I. Discussion This study suggests that during table tennis multi-ball training the male should have a regulatory protocol to compensate the deficit observed in phase II, but the females should be given the protocol in phase I.

DOI : 10.7717/peerj.6262

Anahtar Kelimeler : Center of pressure, Star excursion balance test, Reach distance, Borg rating of perceived exertion, Musculoskeletal

ISSN: 2167-8359
Cilt: 6
Sayfa: e6262

Sınıflandırma :

Tıp ve Halk Sağlığı %61

Spor İlacı %100

Psikoloji %21

Çalışan Sağlığı ve Refahı %67

10

Brief High-Intensity Exercise and Resistive Force Selection in Overweight and Obese Subjects: Body Mass or Body Composition?

Dergi Makalesi

Kaynak :

Taylor and Francis

Dergi:

Research in Sports Medicine

Yazar(lar) :

Julien S. Baker , Bruce Davies

Konu :

Physical Therapy, Sports Therapy and Rehabilitation, Orthopedics and Sports Medicine

Yıl :

2006

Julien S. Baker

Özet Ek Bilgiler

Kaydet

The purpose of this study was to compare the maximal exercise performance of overweight and obese subjects during friction braked cycle ergometry of 10 s duration when resistive forces reflected total-body mass (TBM) or fat-free mass (FFM). Subjects were assigned at random to either protocol. Eleven healthy male university students (age 22.3 ± 2 yrs, body fat 27.1 ± 2%) participated in the study. Differences (P < 0.01) in peak power output (PPO) were found between TBM and FFM (1029 ± 98 W TBM vs. 1397 ± 146 W FFM). The findings of this study suggest that greater peak power outputs are obtainable when resistive forces reflect FFM as opposed to TBM. The results have implications that relate to the pathology of disease, related clinical examinations, and exercise prescription.

DOI : 10.1080/15438620600651298

Anahtar Kelimeler : peak power output, total body mass (TBM), fat free mass (FFM)

ISSN: 1543-8627
Sayı: 2
Cilt: 14
Sayfa: 97-106

Sınıflandırma :

Tıp ve Halk Sağlığı %98

Spor İlacı %100

11

Effect of additional body weight on arch index and dynamic plantar pressure distribution during walking and gait termination

Dergi Makalesi

Kaynak :

Directory of Open Access Journals (DOAJ)

Yazar(lar) :

Xuanzhen Cen , Datao Xu , Julien S. Baker , Yaodong Gu

Yıl :

2020

Julien S. Baker

Özet Ek Bilgiler

Kaydet

The medial longitudinal arch is considered as an essential feature which distinguishes humans from other primates. The longitudinal arch plays a supporting and buffering role in human daily physical activities. However, bad movement patterns could lead to deformation of arch morphology, resulting in foot injuries. The authors aimed to investigate any alterations in static and dynamic arch index following different weight bearings. A further aim was to analyze any changes in plantar pressure distribution characteristics on gait during walking and stopping, Twelve males were required to complete foot morphology scans and three types of gait tests with 0%, 10%, 20% and 30% of additional body weight. The dynamic gait tests included walking, planned and unplanned gait termination. Foot morphology details and plantar pressure data were collected from subjects using the Easy-Foot-Scan and Footscan pressure platform. No significant differences were observed in static arch index when adding low levels of additional body weight (10%). There were no significant changes observed in dynamic arch index when loads were added in the range of 20% to 30%, except in unplanned gait termination. Significant maximal pressure increases were observed in the rearfoot during walking and in both the forefoot and rearfoot during planned gait termination. In addition, significant maximum pressure increases were shown in the lateral forefoot and midfoot during unplanned gait termination when weight was increased. Findings from the study indicated that excessive weight bearing could lead to a collapse of the arch structure and, therefore, increases in plantar loading. This may result in foot injuries, especially during unplanned gait termination.

DOI : 10.7717/peerj.8998

Anahtar Kelimeler : Arch height, Body loading, Plantar loading, Gait termination, Foot morphology

ISSN: 2167-8359
Cilt: 8
Sayfa: e8998

Sınıflandırma :

Tıp ve Halk Sağlığı %93

Spor İlacı %74

12

COVID-19 as a factor influencing air pollution?

Dergi Makalesi

Kaynak :

Science Direct

Dergi:

Environmental Pollution

Yayıncı:

Elsevier

Yazar(lar) :

Frédéric Dutheil , Julien S. Baker , Valentin Navel

Yıl :

2020

Julien S. Baker

Ek Bilgiler

Kaydet

DOI : 10.1016/j.envpol.2020.114466

Anahtar Kelimeler : Sars virus, Mortality, Epidemy, Public health, Air pollutants

ISSN: 0269-7491
Cilt: 263
Sayfa: 114466

Sınıflandırma :

Çevre %99

Atmosferik Koruma %24

Çevresel Sağlık %20

13

Hypertension prior to athletic events: Are we heading for a disaster?

Dergi Makalesi

Kaynak :

Science Direct

Dergi:

Preventive Medicine

Yayıncı:

Elsevier

Yazar(lar) :

Julien S. Baker , Michael Graham , Bruce Davies

Yıl :

2005

Julien S. Baker

Ek Bilgiler

Kaydet

DOI : 10.1016/j.ypmed.2005.09.006

ISSN: 0091-7435
Sayı: 5-6
Cilt: 41
Sayfa: 887-888

Sınıflandırma :

Tıp ve Halk Sağlığı %60

Spor İlacı %87

14

Comparing the biomechanical characteristics between squat and standing serves in female table tennis athletes

Dergi Makalesi

Kaynak :

Directory of Open Access Journals (DOAJ)

Yazar(lar) :

Changxiao Yu , Shirui Shao , Julien S. Baker , Yaodong Gu

Yıl :

2018

Julien S. Baker

Özet Ek Bilgiler

Kaydet

Background The table tennis serve involves complex spatial movements combined with biomechanial characteristics. Although the differences in lower-limb biomechanial characteristics to a great extent influence the translational and spinning velocity of the ball when using the different styles of table tennis serve, few researchers have studied their mechanics. Therefore, the aim of this study was to investigate the differences in lower-limb activity between the squat and standing serves during a table tennis short serve. Methods Ten advanced female table tennis participants performed a squat serve and standing serve in random order. A Vicon motion analysis system and a Novel Pedar insole plantar pressure measurement system were used to record kinematics and kinetics data, respectively. Results Key findings from the study were that the squat serve not only showed significantly larger hip and knee flexion, as well as ankle dorsiflexion, it also showed significantly larger hip adduction and external knee rotation, with larger changing angular rate of the lower limb joints in the sagittal and the transverse planes when the two serving styles were compared. In addition, the force-time integral (FTI) was higher in the rear foot area for the standing serve. Discussion The results demonstrated that the squat serve needs higher lower limb drive during a table tennis short serve compared with a standing serve. These biomechanical considerations may be beneficial for table tennis athletes and coaches as a method of optimizing performance characteristics during both competition and training.

DOI : 10.7717/peerj.4760

Anahtar Kelimeler : Relative loads, Kinematic chain, Lower limb, Center of pressure, Angular changing rate

ISSN: 2167-8359
Cilt: 6
Sayfa: e4760

Sınıflandırma :

Tıp ve Halk Sağlığı %52

Spor İlacı %100

15

The SARS-Cov-2 Pandemic: A Good Time for Stem Cell Transplantation?

Dergi Makalesi

Kaynak :

Science Direct

Dergi:

Biology of Blood and Marrow Transplantation

Yayıncı:

Elsevier

Yazar(lar) :

Frédéric Dutheil , Julien S Baker , Valentin Navel

Yıl :

2020

Julien S Baker

Ek Bilgiler

Kaydet

DOI : 10.1016/j.bbmt.2020.06.009

ISSN: 1083-8791
Sayı: 9
Cilt: 26
Sayfa: e239-e240

Sınıflandırma :

Tıp ve Halk Sağlığı %84

Kan Transfüzyon Tıbbı %78

Nakil Cerrahisi %20

16

The Release of Immunosuppressive Factor(s) in Young Males Following Exercise

Dergi Makalesi

Kaynak 1:

MDPI

Kaynak 2:

Directory of Open Access Journals (DOAJ)

Dergi:

Sensors

Yayıncı:

MDPI AG

Yazar(lar) :

Ye Tian , Jinlei Nie , Tom K. Tong , Julien S. Baker

Yıl :

2012

Julien S. Baker

Ek Bilgiler

Kaydet

Kaynak 1:

http://dx.doi.org/10.3390/s120505586 arayıcılığı görüntüle.
Kaynak 2:

https://doi.org/10.3390/s120505586 arayıcılığı görüntüle.

DOI : 10.3390/s120505586

ISSN: 1424-8220
Sayı: 5
Cilt: 12
Sayfa: 5586-5595

Sınıflandırma :

Biyotıp %87

Nörokimya %24

17

Air pollution in post-COVID-19 world: the final countdown of modern civilization?

Dergi Makalesi

Kaynak :

Springer Link

Dergi:

Environmental Science and Pollution Research

Yazar(lar) :

Frédéric Dutheil , Julien S. Baker , Valentin Navel

Konu :

Health, Toxicology and Mutagenesis, Pollution, Environmental Chemistry, General Medicine

Yıl :

2021

Julien S. Baker

Ek Bilgiler

Kaydet

DOI : 10.1007/s11356-021-14433-0

ISSN: 0944-1344 1614-7499
Sayı: 33
Cilt: 28
Sayfa: 46079-46081

18

Cartilage Stiffness Effect on Foot Biomechanics of Chinese Bound Foot: A Finite Element Analysis.

Dergi Makalesi

Kaynak :

PubMed

Dergi:

Front Physiol

Yazar(lar) :

Yan Zhang , Jan Awrejcewicz , Julien S Baker , Yaodong Gu

Yıl :

2018

Julien S Baker

Piri Tam Metin Bulucu Özet Ek Bilgiler

Kaydet

The purpose of this study is to investigate the effect of cartilage stiffness on inner foot biomechanics of Chinese bound foot while balanced standing using finite element method. A three-dimensional FE model of bound foot involving 28 bones, 72 ligaments, 5 plantar fascia, cartilages, and encapsulated soft tissue was constructed and validated. To conduct the sensitivity analysis of cartilage stiffness, the incremental Young's modulus of 1, 5, 10, and 15 MPa were assigned to the cartilage. 25% of the body weight was applied to the Achilles tendon to adjust the anterior- posterior displacement of center of pressure agreeable with the measured result. As the Young's modulus of cartilage increased, the peak von Mises stress in the fifth metatarsal increased obviously, while that in the calcaneus remains unchanged. The plantar fascia experienced reduced total tension with stiffer cartilage. The cartilage stiffening also caused a general increase of contact pressure at mid- and forefoot joints. Cartilage stiffening due to foot binding gave rise to risks of foot pain and longitude arch damage. Knowledge of this study contributes to the understanding of bound foot biomechanical behavior and demonstrating the mechanism of long-term injury and function damage in terms of weight-bearing due to foot binding.

DOI : 10.3389/fphys.2018.01434

Anahtar Kelimeler : biomechanics, bound foot, finite element analysis, gait, human locomotion

Sınıflandırma :

Tıp ve Halk Sağlığı %98

Spor İlacı %57

Ortopedi %42

19

COVID-19 and macular edema: a necessarily blindness?

Dergi Makalesi

Kaynak :

Springer Link

Dergi:

Graefe's Archive for Clinical and Experimental Ophthalmology

Yazar(lar) :

Valentin Navel , Julien S Baker , Frédéric Dutheil

Konu :

Cellular and Molecular Neuroscience, Sensory Systems, Ophthalmology

Yıl :

2020

Julien S Baker

Ek Bilgiler

Kaydet

DOI : 10.1007/s00417-020-04838-x

ISSN: 0721-832X 1435-702X
Sayı: 11
Cilt: 258
Sayfa: 2569-2570

20

COVID-19 and air pollution: the worst is yet to come

Dergi Makalesi

Kaynak :

Springer Link

Dergi:

Environmental Science and Pollution Research

Yazar(lar) :

Frédéric Dutheil , Julien S. Baker , Valentin Navel

Konu :

Health, Toxicology and Mutagenesis, Pollution, Environmental Chemistry, General Medicine

Yıl :

2020

Julien S. Baker

Ek Bilgiler

Kaydet

DOI : 10.1007/s11356-020-11075-6

ISSN: 0944-1344 1614-7499
Sayı: 35
Cilt: 27
Sayfa: 44647-44649

21

AAS, growth hormone, and insulin abuse: psychological and neuroendocrine effects

Dergi Makalesi

Kaynak :

Directory of Open Access Journals (DOAJ)

Dergi:

Therapeutics and Clinical Risk Management

Yazar(lar) :

Michael R Graham , Peter Evans , Bruce Davies , Julien S Baker

Yıl :

2008

Julien S Baker

Özet Ek Bilgiler

Kaydet

Michael R Graham1, Peter Evans2, Bruce Davies1, Julien S Baker11Health and Exercise Science Research Unit, Faculty of Health Sport and Science, University of Glamorgan, Pontypridd, Wales, United Kingdom; 2Royal Gwent Hospital, Newport, Gwent, United KingdomAbstract: The nontherapeutic use of prescription medicines by individuals involved in sport is increasing. Anabolic-androgenic steroids (AAS) are the most widely abused drug. Much of our knowledge of the psychological and physiological effects of human growth hormone (hGH) and insulin has been learned from deficiency states. As a consequence of the Internet revolution, previously unobtainable and expensive designer drugs, particularly recombinant human growth hormone (rhGH) and insulin, have become freely available at ridiculously discounted prices from countries such as China and are being abused. These drugs have various physiological and psychological effects and medical personnel must become aware that such prescription medicine abuse appears to be used not only for performance and cosmetic reasons, but as a consequence of psychological pre-morbidity.Keywords: AAS, cosmesis, growth hormone, insulin, performance, strength

Cilt: 2008
Sayı: 3
Sayfa: 587 - 597

Sınıflandırma :

Tıp ve Halk Sağlığı %64

Endokrinoloji %49

22

The Effect of Prolonged Running on the Symmetry of Biomechanical Variables of the Lower Limb Joints

Dergi Makalesi

Kaynak :

MDPI

Dergi:

Symmetry

Yayıncı:

MDPI AG

Yazar(lar) :

Zixiang Gao , Qichang Mei , Gusztáv Fekete , Julien S Baker , Yaodong Gu

Yıl :

2020

Julien S Baker

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The aim of this study was to examine whether there are kinematic and kinetic differences in the lower limb and whether the symmetry of the lower extremities is different after prolonged-running. Fifteen healthy male amateur runners (age: 22 ± 1 years, height: 173 ± 8 cm, mass: 65 ± 7 kg, BMI: 21.62 ± 2 kg/m2) were recruited as participants for this study. A Vicon eight-camera motion capture system and Kistler force plate were used to collect kinematic and kinetic parameters. A motorized treadmill, 15-point Borg scale and heart rate bands were used to monitor fatigue during a running-induced fatigue protocol. Paired sample T tests were used to check statistical difference (p = 0.05) between the lower limbs and the symmetry changes in pre-fatigue and post-fatigue running sessions. The symmetry angle (SA) of the knee flexion angle, hip flexion angle and hip extension angle in post-fatigue was significantly greater than in pre-fatigue, increasing by 4.32%, 10.71%, and 23.12%, respectively. Moreover, the SA of hip flexion moment increased by 2.61%. However, the knee extension velocity and hip flexion velocity became more symmetrical than in pre-fatigue (p < 0.05), the SA decreased by 5.91% and 5.45%, respectively. Differences in limb function during post-fatigue may lead to changes of symmetry in the lower limbs. The variables of asymmetry may be used as a compensation mechanism to maintain gait stability. Physical therapy assessment of fatigue injuries and long-distance running training programs may want to consider the changes in symmetry due to limb dominance.

DOI : 10.3390/sym12050720

ISSN: 2073-8994
Sayı: 5
Cilt: 12
Sayfa: 720

Sınıflandırma :

Biyotıp %50

Biyomedikal Mühendisliği ve Biyomühendislik %100

Tıp ve Halk Sağlığı %44

Spor İlacı %97

23

Arterial pulse wave velocity, inflammatory markers, pathological GH and IGF states, cardiovascular and cerebrovascular disease

Dergi Makalesi

Kaynak :

Directory of Open Access Journals (DOAJ)

Dergi:

Vascular Health and Risk Management

Yazar(lar) :

Michael R Graham , Peter Evans , Bruce Davies , Julien S Baker

Yıl :

2008

Julien S Baker

Özet Ek Bilgiler

Kaydet

Michael R Graham1, Peter Evans2, Bruce Davies1, Julien S Baker11Health and Exercise Science Research Unit, Faculty of Health Sport and Science, University of Glamorgan, Pontypridd, Wales, United Kingdom; 2Royal Gwent Hospital, Newport, Gwent, United KingdomAbstract: Blood pressure (BP) measurements provide information regarding risk factors associated with cardiovascular disease, but only in a specific artery. Arterial stiffness (AS) can be determined by measurement of arterial pulse wave velocity (APWV). Separate from any role as a surrogate marker, AS is an important determinant of pulse pressure, left ventricular function and coronary artery perfusion pressure. Proximal elastic arteries and peripheral muscular arteries respond differently to aging and to medication. Endogenous human growth hormone (hGH), secreted by the anterior pituitary, peaks during early adulthood, declining at 14% per decade. Levels of insulin-like growth factor-I (IGF-I) are at their peak during late adolescence and decline throughout adulthood, mirror imaging GH. Arterial endothelial dysfunction, an accepted cause of increased APWV in GH deficiency (GHD) is reversed by recombinant human (rh) GH therapy, favorably influencing the risk for atherogenesis. APWV is a noninvasive method for measuring atherosclerotic and hypertensive vascular changes increases with age and atherosclerosis leading to increased systolic blood pressure and increased left ventricular hypertrophy. Aerobic exercise training increases arterial compliance and reduces systolic blood pressure. Whole body arterial compliance is lowered in strength-trained individuals. Homocysteine and C-reactive protein are two infl ammatory markers directly linked with arterial endothelial dysfunction. Reviews of GH in the somatopause have not been favorable and side effects of treatment have marred its use except in classical GHD. Is it possible that we should be assessing the combined effects of therapy with rhGH and rhIGF-I? Only multiple intervention studies will provide the answer.Keywords: arterial pulse, wave velocity, arterial stiffness, growth hormone, insulin-like growth factor, physiology

Cilt: 4
Sayfa: 1361 - 1371

Sınıflandırma :

Tıp ve Halk Sağlığı %100

Anjiyoloji %97

24

Lower Limb Maneuver Investigation of Chasse Steps Among Male Elite Table Tennis Players

Dergi Makalesi

Kaynak :

MDPI

Dergi:

Medicina

Yayıncı:

MDPI AG

Yazar(lar) :

Changxiao Yu , Shirui Shao , Jan Awrejcewicz , Julien S. Baker , Yaodong Gu

Yıl :

2019

Julien S. Baker

Özet Ek Bilgiler

Kaydet

Background and objectives: The popularity of table tennis has increased globally. As a result, the biomechanical movement patterns in the lower limb during table tennis have attracted extensive attention from coaches, scientists and athletes. The purpose of this study was to compare the differences between the long and short chasse steps in table tennis and evaluate risk factors related to injuries in the lower limb. Materials and Methods: Twelve male elite athletes performed forehand topspin strokes with long and short chasse steps in this study, respectively. The kinematics data of the lower-limb joints were measured by a Vicon motion analysis system. The electromyograms (EMG) of six lower-limb muscles were recorded using a myoelectricity system. Results: The key findings were that the angle change rate of the ankle in the long chasse step was faster with a larger range of motion (ROM) in the coronal and transverse planes. The hip was also faster in the sagittal and transverse planes but slower in the coronal plane compared with the short chasse step. In addition, the vastus medialis (VM) was the first activated muscle in the chasse step. Conclusions: The hip and ankle joints in the long chasse step and the knee joint in the short chasse step have higher susceptibility to injury. Moreover, tibialis anterior (TA), vastus medialis (VM) and gastrocnemius (GM) should be sufficiently stretched and warmed prior to playing table tennis. The results of this study may provide helpful guidance for teaching strategies and providing an understanding of potential sport injury mechanisms.

DOI : 10.3390/medicina55040097

ISSN: 1010-660X
Sayı: 4
Cilt: 55
Sayfa: 97

Sınıflandırma :

Tıp ve Halk Sağlığı %63

Spor İlacı %100

Biyotıp %31

Biyomedikal Mühendisliği ve Biyomühendislik %100

25

Physical Activity Behaviour: An Overview of Current and Emergent Theoretical Practices

Dergi Makalesi

Kaynak :

Hindawi Limited

Dergi:

Journal of Obesity

Yayıncı:

Hindawi

Yazar(lar) :

Duncan S. Buchan , Stewart Ollis , Non E. Thomas , Julien S. Baker

Yıl :

2012

Julien S. Baker

Özet Ek Bilgiler

Kaydet

Physical activity research has been dominated by traditional cognitive rationale paradigms utilized within other domains. Though this approach to physical activity behavior has greatly enhanced our understanding of the key determinants, it has done little to eradicate the health problems we currently face. In order to achieve lasting change though, multilevel interventions may prove effective. Ecological perspectives have been proposed as an effective approach in combating current physical inactivity levels. Nevertheless, this approach is in its infancy and much has still to be learned. The aim of this paper is to provide an overview of the main behavioral models used within the physical activity domain while proposing the need for further models that will embrace the principles presented by ecological and complexity theories.

DOI : https://doi.org/10.1155/2012/546459

Cilt: 2012
ISSN: 2090-0708

26

Considerations in the Use of High Intensity Leg Cycle Ergometry as a Test of Muscular Performance

Dergi Makalesi

Kaynak :

Taylor and Francis

Dergi:

Research in Sports Medicine

Yayıncı:

Informa UK Limited

Yazar(lar) :

Marie Clare McCormick , Julien S. Baker

Konu :

Physical Therapy, Sports Therapy and Rehabilitation, Orthopedics and Sports Medicine

Yıl :

2011

Julien S. Baker