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https://www.readbyqxmd.com/read/27913948/branched-chain-amino-acids-administration-suppresses-endurance-exercise-related-activation-of-ubiquitin-proteasome-signaling-in-trained-human-skeletal-muscle
#1
Evgeny A Lysenko, Tatiana F Vepkhvadze, Egor M Lednev, Olga L Vinogradova, Daniil V Popov
We tested whether post exercise ingestion of branched-chain amino acids (BCAA < 10 g) is sufficient to activate signaling associated with muscle protein synthesis and suppress exercise-induced activation of mechanisms associated with proteolysis in endurance-trained human skeletal muscle. Nine endurance-trained athletes performed a cycling bout with and without BCAA ingestion (0.1 g/kg). Post exercise ACC(Ser79/222) phosphorylation (endogenous marker of AMPK activity) was increased (~3-fold, P < 0...
December 3, 2016: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/27913715/doping-among-professional-athletes-in-iran-a-test-of-akers-s-social-learning-theory
#2
Saeed Kabiri, John K Cochran, Bernadette J Stewart, Mahmoud Sharepour, Mohammad Mahdi Rahmati, Syede Massomeh Shadmanfaat
The use of performance-enhancing drugs (PED) is common among Iranian professional athletes. As this phenomenon is a social problem, the main purpose of this research is to explain why athletes engage in "doping" activity, using social learning theory. For this purpose, a sample of 589 professional athletes from Rasht, Iran, was used to test assumptions related to social learning theory. The results showed that there are positive and significant relationships between the components of social learning theory (differential association, differential reinforcement, imitation, and definitions) and doping behavior (past, present, and future use of PED)...
December 1, 2016: International Journal of Offender Therapy and Comparative Criminology
https://www.readbyqxmd.com/read/27912252/impact-of-stretching-on-the-performance-and-injury-risk-of-long-distance-runners
#3
Claire Baxter, Lars R Mc Naughton, Andy Sparks, Lynda Norton, David Bentley
Stretching, either prior to exercise or at the end, or both, is typically carried out by all individuals undertaking sporting activity whether they be elite or recreational athletes. The many forms of stretching available to the athlete, either passive or active, have long been thought to improve performance, decrease injury and generally be advantageous to the athlete. This review examines the current state of the literature and evaluates what athletes can and should do with respect to this controversial topic...
December 2, 2016: Research in Sports Medicine
https://www.readbyqxmd.com/read/27910804/sudden-cardiac-death-a-nationwide-cohort-study-among-the-young
#4
Bjarke Risgaard
Sudden cardiac death (SCD) is a tragic event affecting millions of individuals worldwide. Although several studies have investigated the epidemiology of SCD, these studies may have been affected by reporting and referral biases, which are reflected in the very different incidence rates and causes of deaths that have previously been reported. Among SCD victims aged < 36 years, inherited cardiac diseases are well known to play an important role. However, the extent to which inherited cardiac diseases also play a role in SCD victims aged < 50 years has not been completely described...
December 2016: Danish Medical Journal
https://www.readbyqxmd.com/read/27909408/reliability-validity-and-usefulness-of-30-15-intermittent-fitness-test-in-female-soccer-players
#5
Nedim Čović, Eldin Jelešković, Haris Alić, Izet Rađo, Erduan Kafedžić, Goran Sporiš, Daniel T McMaster, Zoran Milanović
PURPOSE: The aim of this study was to examine the reliability, validity and usefulness of the 30-15IFT in competitive female soccer players. METHODS: Seventeen elite female soccer players participated in the study. A within subject test-retest study design was utilized to assess the reliability of the 30-15 intermittent fitness test (IFT). Seven days prior to 30-15IFT, subjects performed a continuous aerobic running test (CT) under laboratory conditions to assess the criterion validity of the 30-15IFT. End running velocity (VCT and VIFT), peak heart rate (HRpeak) and maximal oxygen consumption (VO2max) were collected and/or estimated for both tests...
2016: Frontiers in Physiology
https://www.readbyqxmd.com/read/27906965/do-elite-and-amateur-soccer-players-outperform-non-athletes-on-neurocognitive-functioning-a-study-among-8-12-year-old-children
#6
Lot Verburgh, Erik J A Scherder, Paul A M Van Lange, Jaap Oosterlaan
AIM: Research suggested a positive association between physical fitness and neurocognitive functioning in children. Aim of the present study is to investigate possible dose-response relationships between diverse daily physical activities and a broad range of neurocognitive functions in preadolescent children. Furthermore, the relationship between several sedentary behaviours, including TV-watching, gaming and computer time, and neurocognitive functioning will be investigated in this group of children...
2016: PloS One
https://www.readbyqxmd.com/read/27906554/sleep-quality-and-high-intensity-interval-training-at-two-different-times-of-day-a-crossover-study-on-the-influence-of-the-chronotype-in-male-collegiate-soccer-players
#7
Jacopo A Vitale, Matteo Bonato, Letizia Galasso, Antonio La Torre, Giampiero Merati, Angela Montaruli, Eliana Roveda, Franca Carandente
The influence of the chronotype on the sleep quality in male collegiate soccer players in response to acute high intensity interval training (HIIT) performed at two different times of day was evaluated. The sleep quality was poorer in the morning-type than in the evening-type players after the evening HIIT session, whereas no significant changes in the sleep quality of the two chronotypes after the morning HIIT session was observed. The results suggest that an athlete's chronotype should be taken into account when scheduling training sessions and to promote faster recovery processes...
December 1, 2016: Chronobiology International
https://www.readbyqxmd.com/read/27905864/determining-friction-and-effective-loading-for-sled-sprinting
#8
Matt R Cross, Farhan Tinwala, Seth Lenetsky, Pierre Samozino, Matt Brughelli, Jean-Benoit Morin
Understanding the impact of friction in sled sprinting allows the quantification of kinetic outputs and the effective loading experienced by the athlete. This study assessed changes in the coefficient of friction (µk) of a sled sprint-training device with changing mass and speed to provide a means of quantifying effective loading for athletes. A common sled equipped with a load cell was towed across an athletics track using a motorised winch under variable sled mass (33.1-99.6 kg) with constant speeds (0...
December 1, 2016: Journal of Sports Sciences
https://www.readbyqxmd.com/read/27905859/baseline-neurocognitive-performance-and-clearance-for-athletes-to-return-to-contact
#9
Breton M Asken, James R Clugston, Aliyah R Snyder, Russell M Bauer
CONTEXT:  Computerized neurocognitive assessments are commonly used to manage sport-related concussion. Variations in baseline performance may influence neurocognitive performance after injury as well as the amount of time needed for an athlete to be cleared for return to sport participation. OBJECTIVE:  To investigate the relationship between mean baseline Immediate Post-Concussion Assessment and Cognitive Test (ImPACT) scores and postconcussion reliable decline as well as the association between postconcussion cognitive decline and days missed after injury...
December 1, 2016: Journal of Athletic Training
https://www.readbyqxmd.com/read/27905858/seasonal-effects-on-body-composition-muscle-characteristics-and-performance-of-collegiate-swimmers-and-divers
#10
Erica J Roelofs, Abbie E Smith-Ryan, Eric T Trexler, Katie R Hirsch
CONTEXT:  Previous researchers have indicated the importance of body composition and muscle quality in athletic performance. However, body composition and muscle-quality measures in swimmers and divers over a training season have yet to be evaluated. OBJECTIVE:  To identify changes in body composition and muscle characteristics over a competitive season and identify relationships between these variables and performance in National Collegiate Athletic Association Division I swimmers and divers...
December 1, 2016: Journal of Athletic Training
https://www.readbyqxmd.com/read/27904797/preseason-jump-and-hop-measures-in-male-collegiate-basketball-players-an-epidemiologic-report
#11
Jason Brumitt, Amy Engilis, Dale Isaak, Amy Briggs, Alma Mattocks
BACKGROUND: Injuries are inherent in basketball with lower extremity (LE) injury rates reported as high as 11.6 per 1000 athletic exposures (AEs); many of these injuries result in time loss from sport participation. A recent trend in sports medicine research has been the attempt to identify athletes who may be at risk for injury based on measures of preseason fitness. HYPOTHESIS/PURPOSE: The purpose of this prospective cohort study was to determine if the standing long jump (SLJ) and/or the single-leg hop (SLH) for distance functional performance tests (FPT) are associated with non-contact time loss lower quadrant (LQ, defined as lower extremities or low back) injury in collegiate male basketball players...
December 2016: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/27904796/functional-hop-tests-and-tuck-jump-assessment-scores-between-female-division-i-collegiate-athletes-participating-in-high-versus-low-acl-injury-prone-sports-a-cross-sectional-analysis
#12
Philipp Hoog, Meghan Warren, Craig A Smith, Nicole J Chimera
BACKGROUND: Although functional tests including the single leg hop (SLH), triple hop (TH), cross over hop (COH) for distance, and the tuck jump assessment (TJA) are used for return to play (RTP) criteria for post anterior cruciate ligament (ACL) injury, sport-specific baseline measurements are limited. PURPOSE: The purpose of this study was to examine differences in SLH, TH, and COH distance and limb symmetry index (LSI), as well as total scores, number of jumps, and individual flaws of the TJA in 97 injury-free Division I (DI) collegiate female student athletes participating in ACL injury prone vs...
December 2016: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/27904795/the-nine-test-screening-battery-normative-values-on-a-group-of-recreational-athletes
#13
Frida Flodström, Annette Heijne, Mark E Batt, Anna Frohm
BACKGROUND: A variety of risk factors predispose athletes to injury, such as impaired neuromuscular control, insufficient core stability, and muscular imbalances. The goal of assessing functional movement patterns is to detect imbalances and correct them with prevention strategies and thereby decrease injuries, and improve performance and quality of life. PURPOSE: The purpose of this study was to generate normative values for the 'Nine Test Screening Battery' (9TSB) in a group of recreational athletes...
December 2016: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/27904788/examination-of-the-patellofemoral-joint
#14
Robert C Manske, George J Davies
Patellofemoral pain is one of the leading causes of knee pain in athletes. The many causes of patellofemoral pain make diagnosis unpredictable and examination and treatment difficult. This clinical commentary discusses a detailed physical examination routine for the patient with patellofemoral pain. Critically listening and obtaining a detailed medical history followed by a clearly structured physical examination will allow the physical therapist to diagnose most forms of patellofemoral pain. This clinical commentary goes one step further by suggesting an examination scheme and order in which it should be performed during the examination process...
December 2016: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/27904629/effect-of-various-kinds-of-beverages-on-stress-oxidative-f2-isoprostane-serum-lipid-and-blood-glucose-of-elite-taekwondo-players
#15
Zahra Maghsoudi, Ashfin Shiranian, Gholamreza Askai, Reza Ghaisvand
BACKGROUND: Athletes' recovery is important in improving their performance. Nutritional strategies can be effective in enhancing recovery rate. Choosing the best food items in appropriate intervals can play effective roles in resynthesis of fuels and recovery of muscle injury. Beverage micro and macronutrient content are helpful in fuel restoration. In this study, we assess the effects of various kinds of beverages on oxidative stress, muscle injury, and metabolic risk factors in taekwondo players...
September 2016: Iranian Journal of Nursing and Midwifery Research
https://www.readbyqxmd.com/read/27904439/training-time-frame-a-possible-key-to-literature-discrepancy-on-fasting-athletes
#16
Navid Moghadam, Farzin Farahbakhsh
There is a discrepancy in the literature as to whether fasting during Ramadan affects athletic performance. We suggest in this letter that the time frame for training is a confounding variable that has been missed in the literature.
2016: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/27903590/anterior-cruciate-ligament-derived-stem-cells-transduced-with-bmp2-accelerate-graft-bone-integration-after-acl-reconstruction
#17
Yohei Kawakami, Koji Takayama, Tomoyuki Matsumoto, Ying Tang, Bing Wang, Yutaka Mifune, James H Cummins, Ryan J Warth, Ryosuke Kuroda, Masahiro Kurosaka, Freddie H Fu, Johnny Huard
BACKGROUND: Strong graft-bone integration is a prerequisite for successful graft remodeling after reconstruction of the anterior cruciate ligament (ACL) using soft tissue grafts. Novel strategies to accelerate soft tissue graft-bone integration are needed to reduce the need for bone-tendon-bone graft harvest, reduce patient convalescence, facilitate rehabilitation, and reduce total recovery time after ACL reconstruction. HYPOTHESIS: The application of ACL-derived stem cells with enhanced expression of bone morphogenetic protein 2 (BMP2) onto soft tissue grafts in the form of cell sheets will both accelerate and improve the quality of graft-bone integration after ACL reconstruction in a rat model...
November 30, 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/27903048/resistance-exercise-induced-rhabdomyolysis-need-for-immediate-intervention-and-proper-counselling
#18
Maysaa A Khalil, Basem R Saab
BACKGROUND: Rhabdomyolysis results from damage to skeletal muscle. Improper resistance training may result in rhabdomyolysis, which can cause acute kidney injury, serious metabolic abnormalities, compartmental syndrome and even death. Proper counselling for athletes may prevent this condition. OBJECTIVE: We present two patients with unilateral swelling after resistance exercise. The workup revealed rhabdomyolysis. We highlight the importance of counselling to prevent rhabdomyolysis secondary to resistance exercise...
December 2016: Australian Family Physician
https://www.readbyqxmd.com/read/27902891/computerized-agility-training-improves-change-of-direction-and-balance-performance-independently-of-footwear-in-young-adults
#19
Max R Paquette, Brian K Schilling, Joshua D Bravo, Shelby A Peel, Yuhua Li, Robert J Townsend
: Understanding the effects of training in different footwear on sporting performance would be useful to coaches and athletes. PURPOSE: This study compared the effects of computerized agility training using 3 types of footwear on change-of-direction and balance performance in young adults. METHOD: Thirty recreationally active young adults (Mage = 22.8 ± 3.1 years; Mheight = 1.71 ± 0.7 m; Mbodymass = 73.4 ± 10.3 kg) were randomly assigned to a 6-week computerized agility training intervention in 1 of 3 footwear groups (n = 10/group): barefoot, minimal footwear, or traditional shoes...
November 30, 2016: Research Quarterly for Exercise and Sport
https://www.readbyqxmd.com/read/27901587/changes-in-functional-connectivity-of-the-brain-associated-with-a-history-of-sport-concussion-a-preliminary-investigation
#20
Nathan Churchill, Michael G Hutchison, General Leung, Simon Graham, Tom A Schweizer
OBJECTIVE: There is evidence of long-term clinical consequences associated with a history of sport concussion. However, there remains limited information about the underlying changes in brain function. The goal of this study was to identify brain regions where abnormal resting-state function is associated with chronic concussion, for athletes without persistent symptoms. METHODS: Functional Magnetic Resonance Imaging (fMRI) was performed on a group of athletes with prior concussion (n = 22) and a group without documented injury (n = 21)...
November 30, 2016: Brain Injury: [BI]
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