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https://www.readbyqxmd.com/read/28641201/pelvic-and-hip-kinematics-during-single-leg-drop-landing-are-altered-in-sports-participants-with-long-standing-groin-pain-a-cross-sectional-study
#1
L Janse van Rensburg, M Dare, Q Louw, L Crous, J Cockroft, L Williams, B Olivier
OBJECTIVES: The aim of this study was to determine the differences in three-dimensional pelvic and hip kinematics during a single-leg drop-landing task in active sports participants with long-standing groin pain compared to healthy matched controls. DESIGN: This was a descriptive study incorporating a cross-sectional design. SETTING: The study was conducted at the Unit for Human Movement Analysis, Stellenbosch University, South Africa. PARTICIPANTS: The study sample was comprised of 20 male club level soccer, rugby, running and cycling participants between the ages of 18 and 55 years...
May 12, 2017: Physical Therapy in Sport
https://www.readbyqxmd.com/read/28640774/the-difference-between-countermovement-and-squat-jump-performances-a-review-of-underlying-mechanisms-with-practical-applications
#2
Bas Van Hooren, Julia Zolotarjova
Van Hooren, B and Zolotarjova, J. The difference between countermovement and squat jump performances: a review of underlying mechanisms with practical applications. J Strength Cond Res 31(7): 2011-2020, 2017-Two movements that are widely used to monitor athletic performance are the countermovement jump (CMJ) and squat jump (SJ). Countermovement jump performance is almost always better than SJ performance, and the difference in performance is thought to reflect an effective utilization of the stretch-shortening cycle...
July 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28627298/a-prospective-transcranial-doppler-ultrasound-based-evaluation-of-the-acute-and-cumulative-effects-of-sport-related-concussion-on-neurovascular-coupling-response-dynamics
#3
Alexander D Wright, Jonathan D Smirl, Kelsey Bryk, Paul van Donkelaar
Sport-related concussion has been shown to alter cerebral blood flow (CBF) both acutely and chronically, and may exert cumulative effects across multiple injuries. Such dysfunction may be mediated by trauma-induced deficits to CBF control mechanisms, though our understanding of these effects is limited, including dynamics of neurovascular coupling (NVC) responses (i.e. CBF responses to neurologic demand). 179 junior-level contact sport athletes completed preseason testing - 42 reported never having experienced a concussion (Hx-) while 31 had endured three or more (Hx3+)...
June 18, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/28622665/non-invasive-in-situ-measurement-of-blood-lactate-using-microwave-sensors
#4
Alex Mason, Olga Korostynska, Julien Louis, Luis Eduardo Cordova-Lopez, Badr Abdullah, Jacob Greene, Rob Connell, John Hopkins
GOAL: This paper reports the use of a novel electromagnetic sensor technique for real-time non-invasive monitoring of blood lactate in human subjects. METHODS: The technique was demonstrated on 34 participants who undertook a cycling regime, with rest period before and after, to produce a rising and falling lactate response curve. Sensors attached to the arm and legs of participants gathered spectral data, blood samples were measured using a Lactate Pro V2, as well as temperature and heart rate data were collected...
June 14, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28619395/the-new-front-in-the-war-on-doping-amateur-athletes
#5
April D Henning, Paul Dimeo
The war on drugs is usually associated with criminal policies aimed at stemming consumption of drugs such as heroin, cocaine, and cannabis, less so with enhancement drugs like those used in sport. As drug use in sport, or doping, has become more visibly widespread, policies aimed at combating the issue have become more restrictive, intrusive, and harsh. In this article we draw new comparisons between the wider war on drugs and recent developments in sports anti-doping. We identify a growing trend towards criminalisation of traffickers and users, and associate that with another growing trend: the testing of amateur athletes...
June 12, 2017: International Journal on Drug Policy
https://www.readbyqxmd.com/read/28598803/bicycle-and-helmet-use-of-adolescents-in-markham-canada
#6
Michael Borean, Stephanie Ho, Drew Hollenberg, Tharani Anpalagan, Anna Rzepka, Jaclyn Viehweger, Christopher Ho, Isaac Rigby, Ronald Chow
Bicycle crashes are the second most common sports- or recreation-associated cause of serious injury. While the literature suggests that wearing protective helmets can significantly decrease risks associated with bicycle-related injuries, overall helmet use remains sub-optimal. A recent study by Chow et al. suggested that helmet-wearing rates in adolescent boys are negatively correlated with age. The aim of this study was to determine if similar trends are observed in a co-educational high school setting. A questionnaire was circulated at Unionville High School, a co-ed public high school in Markham, Canada...
June 9, 2017: International Journal of Adolescent Medicine and Health
https://www.readbyqxmd.com/read/28575558/-model-ontogenetic-variability-functional-state-of-the-organism-in-different-modes-of-motor-activity
#7
V V Myakotnyh, L S Khodasevich
The analysis of the study results of remote training effect of physical training and sports in the age range including the later periods of human ontogenesis, from the point of oxidative stress theory. To study the characteristics of developmental variability of the functional state of the organism, a comparative study of the functional state of the body at different modes of physical activity in different age stages of development was carried out: from sports veterans, remain actively locomotor activity after the termination of sports career; former athletes, leading a sedentary lifestyle; persons engaged in improving the forms of physical exercise; as well as persons who had not engaged in regular physical activity...
2017: Advances in Gerontology, Uspekhi Gerontologii
https://www.readbyqxmd.com/read/28557858/effects-of-combined-strength-and-sprint-training-on-lean-mass-strength-power-and-sprint-performance-in-masters-road-cyclists
#8
Luke Del Vecchio, Robert Stanton, Peter Reaburn, Campbell Macgregor, Jarrod Meerkin, Jerome Villegas, Marko T Korhonen
Strength and sprint training exercises are integral part of training in many younger endurance cyclists to improve cycling efficiency and sprinting ability. This study was undertaken to examine whether muscle and performance characteristics could be improved in endurance-trained masters cyclist by adding strength and sprint training stimuli into their training regimen. Twenty five masters road cyclists were assigned to a combined strength and sprint training group (CT; n=9, 53.5 ± 9.3 years), a sprint training group (ST, n=7, 49...
May 25, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28552834/high-impact-sport-after-hip-resurfacing-the-ironman-triathlon
#9
J Girard, A Lons, T Pommepuy, R Isida, K Benad, S Putman
BACKGROUND: Returning to high-impact sport is an increasingly frequent functional demand following hip replacement. The literature, however, is sparse on the subject and nonexistent regarding triathlon. We therefore conducted a retrospective study of hip resurfacing in triathlon players, to determine: (1) whether it is possible to return to this kind of sport; (2) if so, whether it is possible to return to the same level; and (3) how a resurfaced hip behaves under these conditions. HYPOTHESIS: Hip resurfacing allows return to competition level in long-distance triathlon...
May 25, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28541651/channel-crack-designed-gold-pu-sponge-for-highly-elastic-piezoresistive-sensor-with-excellent-detectability
#10
Yun-Hui Wu, Hai-Zhou Liu, Song Chen, Xu-Chu Dong, Ping-Ping Wang, Shu-Qi Liu, Yong Lin, Yong Wei, Lan Liu
It is a great challenge to fabricate piezoresistive sensors that possess high elasticity, large-area compliance, and excellent detectability to satisfy both extremely tiny and large human activity monitoring. Herein, a novel and facile strategy is reported to manufacture highly elastic channel crack-based gold@PU sponge piezoresistive material. The elastic 3D conductive network is successfully prepared by gold ion sputtering, and channel cracks are skillfully designed on the 3D sponge skeletons. Such novel structure makes these fabricated sensors are capable of monitoring both tiny and large human motions, which originate from the nanocrack joint sensing mechanism and physical contact of conductive interconnected network...
June 5, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28538496/committee-opinion-no-702-female-athlete-triad
#11
(no author information available yet)
The female athlete triad is a medical condition observed in physically active females involving three components: 1) low energy availability with or without disordered eating, 2) menstrual dysfunction, and 3) low bone density. An individual does not need to show clinical manifestations of all three components of the female athlete triad simultaneously to be affected by the condition. Consequences of these clinical conditions may not be completely reversible, so prevention, early diagnosis, and intervention are critical...
June 2017: Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28538492/committee-opinion-no-702-summary-female-athlete-triad
#12
(no author information available yet)
The female athlete triad is a medical condition observed in physically active females involving three components: 1) low energy availability with or without disordered eating, 2) menstrual dysfunction, and 3) low bone density. An individual does not need to show clinical manifestations of all three components of the female athlete triad simultaneously to be affected by the condition. Consequences of these clinical conditions may not be completely reversible, so prevention, early diagnosis, and intervention are critical...
June 2017: Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28538317/effects-of-inertial-setting-on-power-force-work-and-eccentric-overload-during-flywheel-resistance-exercise-in-women-and-men
#13
Luis M Martinez-Aranda, Rodrigo Fernandez-Gonzalo
Exercise load is a key component in determining end-point adaptations to resistance exercise. Yet, there is no information regarding the use of different inertia (i.e., loads) during isoinertial flywheel resistance exercise, a very popular high-intensity training model. Thus, this study examined power, work, force, and eccentric overload produced during flywheel resistance exercise with different inertial settings in men and women. Twenty-two women (n = 11) and men (n = 11) performed unilateral (in both legs) isolated concentric (CON) and coupled CON and eccentric (ECC) exercise in a flywheel knee extension device employing 6 inertias (0...
June 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28521375/a-genetic-marker-associated-with-shoulder-dislocation
#14
Stuart Kim, John P Kleimeyer, Marwa A Ahmed, Andy L Avins, Michael Fredericson, Jason L Dragoo, John P A Ioannidis
Shoulder dislocations are common shoulder injuries associated with athletic activity in contact sports, such as football, rugby, wrestling, and hockey. Identifying genetic loci associated with shoulder dislocation could shed light on underlying mechanisms for injury and identify predictive genetic markers. To identify DNA polymorphisms associated with shoulder dislocation, a genome-wide association screen was performed using publically available data from the Research Program in Genes, Environment and Health including 662 cases of shoulder dislocation and 82 602 controls from the European ancestry group...
May 18, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28516252/chronic-eccentric-arm-cycling-improves-maximum-upper-body-strength-and-power
#15
Steven J Elmer, Dakota J Anderson, Travis R Wakeham, Matthew A Kilgas, John J Durocher, Stan L Lindstedt, Paul C LaStayo
INTRODUCTION: Eccentric leg cycling (cycle ergometry adapted to impose muscle lengthening contractions) offers an effective exercise for restoring lower-body muscular function, maintaining health, and improving performance in clinical and athletic populations. PURPOSE: We extended this model to the upper body and evaluated the effectiveness of a 7-week eccentric arm cycling (ECCarm) intervention to improve upper-body muscular function. We also explored whether ECCarm would alter arterial function...
May 17, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28515841/demands-of-simulated-commuting-using-an-electrically-assisted-bicycle
#16
D Taylor LA Salle, Robert Shute, Matthew Heesch, Dustin Slivka
The American College of Sports Medicine (ACSM) recommends adults participate in weekly aerobic activity for a minimum of 30 minutes moderate intensity exercise 5 days per week or 20 minutes of vigorous activity 3 days per week. The electrically assisted bicycle may help individuals achieve the ACSM's aerobic recommendations and introduce inactive individuals to physical activity. To compare the physiological requirements of riding a bicycle with electric pedal assist versus non-assist among healthy active young adults...
2017: International Journal of Exercise Science
https://www.readbyqxmd.com/read/28513268/effects-of-volume-training-on-strength-and-endurance-of-back-muscles-a-randomized-controlled-trial
#17
Leonardo Shigaki, Cynthia Gobbi Alves Araújo, Mariane Guizeline Calderon, Thais Karoline Cezar Costa, Andreo Fernando Aguiar, Leonardo Oliveira Pena Costa, Rubens A da Silva
CONTEXT: Strength/resistance training volume has historically been supported in the American College of Sports Medicine recommendations. However, for the back muscles, exercise prescription related to the number of sets, such as single vs. multiple, is not well established in the literature. OBJECTIVE: The purpose of this study was to compare the effects of two training volumes on strength and endurance of back extensor muscles in untrained young participants, with regard to a repeated measures design...
May 17, 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/28511496/effect-of-passive-active-and-combined-warm-up-on-lower-limb-muscle-performance-and-dynamic-stability-in-recreational-sports-players
#18
Kedar Gogte, Prateek Srivastav, Ganesh Balthillaya Miyaru
INTRODUCTION: Warm up is an activity that is done before a sports activity. The warm up can be done actively and passively. The preferred mode is active warm up in athletes. There are inconclusive effects of passive warm up compared with an active warm up on short term muscle performance. The cumulative effect of passive and active warm up on muscle performance and dynamic stability is not known. AIM: To find out the effects of passive, active and combined warm up on lower limb muscle performance and dynamic stability in recreational sports players...
March 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28507521/prime-time-light-exposures-do-not-seem-to-improve-maximal-physical-performance-in-male-elite-athletes-but-enhance-end-spurt-performance
#19
Raphael Knaier, Juliane Schäfer, Anja Rossmeissl, Christopher Klenk, Henner Hanssen, Christoph Höchsmann, Christian Cajochen, Arno Schmidt-Trucksäss
Many sports competitions take place during television prime time, a time of the day when many athletes have already exceeded their time of peak performance. We assessed the effect of different light exposure modalities on physical performance and melatonin levels in athletes during prime time. Seventy-two young, male elite athletes with a median (interquartile range) age of 23 (21; 29) years and maximum oxygen uptake (VO2max) of 63 (58; 66) ml/kg/min were randomly assigned to three different light exposure groups: bright light (BRIGHT), blue monochromatic light (BLUE), and control light (CONTROL)...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28475656/nmr-based-metabolomic-analysis-for-the-effects-of-creatine-supplementation-on-mouse-myoblast-cell-line-c2c12
#20
Wenqi Xu, Donghai Lin, Caihua Huang
Creatine (Cr) supplementation has drawn much attention from researchers owing to its widespread efficacy in sports, and more recently, in therapeutic fields. However, the underlying molecular mechanisms remain elusive. Here, we performed nuclear magnetic resonance-based metabolomic analysis to address the metabolic profile of aqueous extracts from the mouse myoblast cell line C2C12 exposed to 2 mM Cr for 24 h (the Cr-treated group). Results showed that Cr supplementation facilitated the proliferation of C2C12 myoblasts...
May 5, 2017: Acta Biochimica et Biophysica Sinica
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