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https://www.readbyqxmd.com/read/28226433/preliminary-results-of-residual-deficits-observed-in-athletes-with-concussion-history-combined-eeg-and-cognitive-study
#1
Tamanna T K Munia, Jeffrey L Gendreau, Ajay K Verma, Benjamin D Johnson, Mark Romanick, Kouhyar Tavakolian, Reza Fazel-Rezai, Tamanna T K Munia, Jeffrey L Gendreau, Ajay K Verma, Benjamin D Johnson, Mark Romanick, Kouhyar Tavakolian, Reza Fazel-Rezai, Reza Fazel-Rezai, Jeffrey L Gendreau, Benjamin D Johnson, Tamanna T K Munia, Ajay K Verma, Kouhyar Tavakolian, Mark Romanick
Assessment, treatment, and management of sport-related concussions are a widely recognized public health issue. Although several neuropsychological and motor assessment tools have been developed and implemented for sports teams at various levels and ages, the sensitivity of these tests has yet to be validated with more objective measures to make return-to-play (RTP) decisions more confidently. The present study sought to analyze the residual effect of concussions on a sample of adolescent athletes who sustained one or more previous concussions compared to those who had no concussion history...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28222576/may-a-unitary-autonomic-index-help-assess-autonomic-cardiac-regulation-in-elite-athletes-preliminary-observations-on-the-national-italian-olympic-committee-team
#2
Roberto Sala, Mara Malacarne, Fabio Tosi, Manuela Benzi, Nadia Solaro, Stefano Tamorri, Antonio Spataro, Massimo Pagani, Daniela Lucini
BACKGROUND: Long term endurance training, as occurring in elite athletes, is associated to cardiac neural remodeling in favor of cardioprotective vagal mechanisms, resulting in resting bradycardia and augmented contribution of cardiac parasympathetic nerve activity. Autonomic assessment can be performed by way of Heart Rate Variability. This technique however provides multiple indices, and there is not yet complete agreement on their specific significance. Purpose of the study was to assess whether a rank transformation and radar plot could provide a unitary autonomic index, capable to show a correlation between intensity of individual work and quality of autonomic regulation...
February 21, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28214540/cognitive-performance-of-male-and-female-c57bl-6j-mice-after-repetitive-concussive-brain-injuries
#3
Alexander G Velosky, Laura B Tucker, Amanda H Fu, Jiong Liu, Joseph T McCabe
In contact sports, repetitive concussive brain injury (rCBI) is the prevalent form of head injury seen in athletes. The need for effective treatment is urgent as rCBI has been associated with a host of cognitive, behavioral and neurological complaints. There has been a growing trend in the use of female animals in pre-clinical research, but few studies have investigated possible sex differences following rCBI. The goal of the current study was to determine any differences between male and female C57BL/6J mice on assessments of learning and memory after repetitive concussive injury...
February 15, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28212449/energy-intake-and-energy-expenditure-of-pre-professional-female-contemporary-dancers
#4
Meghan A Brown, Glyn Howatson, Edel Quin, Emma Redding, Emma J Stevenson
Many athletes in aesthetic and weight dependent sports are at risk of energy imbalance. However little is known about the exercise and eating behaviours of highly trained dance populations. This investigation sought to determine the energy intake and energy expenditure of pre-professional female contemporary dancers. Twenty-five female contemporary dance students completed the study. Over a 7-day period, including five week days (with scheduled dance training at a conservatoire) and two weekend days (with no scheduled dance training at the conservatoire), energy intake (self-reported weighed food diary and 24 h dietary recall) and expenditure (tri-axial accelerometry) were recorded...
2017: PloS One
https://www.readbyqxmd.com/read/28208990/swiss-ball-versus-mat-exercises-for-core-activation-of-transverse-abdominis-in-recreational-athletes
#5
Prateek Srivastav, Nirmala Nayak, Sudeep Nair, Lobsang Bhuti Sherpa, Diana Dsouza
INTRODUCTION: Core stability is an essential component for improving athletic performance and injury prevention. Exercises on a Swiss ball and on the mat are two different ways of improving core stability. Comparison of these methods can help physiotherapists incorporate the better method for athletic training and rehabilitation. AIM: To compare swiss ball and mat exercises for core stability of transverse abdominis in recreational athletes. MATERIALS AND METHODS: This pilot randomized control trial was performed on a total of 25 recreational athletes...
December 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28204901/the-effect-of-hydration-status-on-the-measurement-of-lean-tissue-mass-by-dual-energy-x-ray-absorptiometry
#6
Clodagh M Toomey, William G McCormack, Phil Jakeman
PURPOSE: Athletes cycle between exercise and recovery. Exercise invokes changes in total body water from thermal sweating, muscle and hepatic glycogen depletion and metabolic water loss. Recovery from exercise results in rehydration, substrate repletion, and possible glycogen supercompensation. Such changes may corrupt the measurement of hydrated tissues, such as lean tissue mass (LTM), by dual-energy X-ray absorptiometry (DXA). The purpose of this study was to determine the effect of exercise and thermal dehydration and subsequent glycogen supercompensation on DXA-based measurement of body composition...
February 16, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28203599/surgical-management-of-rectus-femoris-avulsion-among-professional-soccer-players
#7
Bertrand Sonnery-Cottet, Nuno Camelo Barbosa, Sanesh Tuteja, Roland Gardon, Matt Daggett, Damien Monnot, Charles Kajetanek, Mathieu Thaunat
BACKGROUND: Rectus femoris injuries are common among athletes, especially in kicking sports such as soccer; however, proximal rectus femoris avulsions in athletes are a relatively rare entity. PURPOSE/HYPOTHESIS: The purpose of this study was to describe and report the results of an original technique of surgical excision of the proximal tendon remnant followed by a muscular suture repair. Our hypothesis was that this technique limits the risk of recurrence in high-level athletes and allows for rapid recovery without loss of quadriceps strength...
January 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28203589/prevalence-of-vitamin-d-insufficiency-in-professional-hockey-players
#8
Nima Mehran, Brian M Schulz, Brian R Neri, William J Robertson, Orr Limpisvasti
BACKGROUND: Vitamin D is a fat-soluble hormone that plays a role in bone health, muscle function, and athletic performance. Studies have shown that low levels of vitamin D can lead to slower muscle recovery and function, increased rates of stress fractures, and even poorer athletic performance. Insufficient vitamin D levels have been demonstrated in professional basketball and football players, however, there have been no studies to date reviewing vitamin D insufficiency in professional hockey players...
December 2016: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28203588/return-to-play-and-prior-performance-in-major-league-baseball-pitchers-after-repair-of-superior-labral-anterior-posterior-tears
#9
Ryan Smith, Daniel J Lombardo, Graysen R Petersen-Fitts, Charles Frank, Troy Tenbrunsel, Gannon Curtis, James Whaley, Vani J Sabesan
BACKGROUND: The published return-to-play (RTP) rates for Major League Baseball (MLB) pitchers who have undergone surgical repair of superior labrum anterior-posterior (SLAP) tears vary widely and are generally accepted to be lower in the subset of competitive throwers. The efficacy of surgical treatment for MLB players is largely unknown. PURPOSE: To examine the RTP rate and performance of MLB pitchers who have undergone SLAP tear repair between 2003 and 2010. STUDY DESIGN: Descriptive epidemiological study...
December 2016: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28195970/reduction-of-physiological-strain-under-a-hot-and-humid-environment-by-a-hybrid-cooling-vest
#10
Albert P C Chan, Y Yang, Francis K W Wong, Michael C H Yam, Del P Wong, W F Song
Cooling treatment is regarded as one of good practices to provide safe training conditions to athletic trainers in the hot environment. The present study aimed to investigate whether wearing a commercial lightweight and portable hybrid cooling vest that combines air ventilation fans with frozen gel packs was an effective means to reduce participants' body heat strain. In this within-subject repeated measures study, 10 male volunteers participated in two heat-stress trials (one with the cooling vest - COOL condition, and another without - CON condition, in a randomized order) inside a climatic chamber with a controlled ambient temperature 33 °C and relative humidity (RH) 75% on an experimental day...
February 8, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28188371/the-effect-of-functional-overreaching-on-parameters-of-autonomic-heart-rate-regulation
#11
Clint R Bellenger, Rebecca L Thomson, Eileen Y Robertson, Kade Davison, Maximillian J Nelson, Laura Karavirta, Jonathan D Buckley
PURPOSE: Correlations between fatigue-induced changes in performance and maximal rate of HR increase (rHRI) may be affected by differing assessment workloads. This study evaluated the effect of assessing rHRI at different workloads on performance tracking, and compared this with HR variability (HRV) and HR recovery (HRR). METHODS: Performance [5-min cycling time trial (5TT)], rHRI (at multiple workloads), HRV and HRR were assessed in 12 male cyclists following 1 week of light training (LT), 2 weeks of heavy training (HT) and a 10-day taper (T)...
February 11, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28182508/effects-of-carbohydrate-ingestion-and-carbohydrate-mouth-rinse-on-repeat-sprint-performance
#12
Ben M Krings, Timothy J Peterson, Brandon D Shepherd, Matthew J McAllister, JohnEric W Smith
The purpose of this investigation was to examine to the influence of carbohydrate ingestion (CHOI) and carbohydrate mouth rinse (CHOR) on acute repeat maximal sprint performance. Fourteen healthy males (age: 21.7 ± 1.8 years, mass: 82.3 ± 12.3 kg) completed a total of five 15-second maximal repeat sprints on a cycle ergometer against 0.075 kg . kg(-1) body mass each separated by four minutes of active recovery. Subjects completed four experimental trials and were randomly assigned one of four treatments: (1) CHOI, (2) CHOR, (3) placebo mouth rinse (PLAR), (4) placebo ingestion (PLAI)...
February 9, 2017: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/28179228/dietary-nitrate-does-not-reduce-oxygen-cost-of-exercise-or-improve-muscle-mitochondrial-function-in-mitochondrial-myopathy-patients
#13
Miranda Nabben, Joep P J Schmitz, Jolita Ciapaite, Carlijn M P Le Clercq, Natal A van Riel, Harm R Haak, Klaas Nicolay, Irenaeus F de Coo, Hubert J M Smeets, Stephan F Praet, Luc J C van Loon, Jeanine J Prompers
Muscle weakness and exercise intolerance negatively affect the quality of life of mitochondrial myopathy patients. Short-term dietary nitrate supplementation has been shown to improve exercise performance and reduce oxygen cost of exercise in healthy humans and trained athletes. We investigated if 1 week of dietary inorganic nitrate supplementation decreases the oxygen cost of exercise and improves mitochondrial function in mitochondrial myopathy patients. Ten mitochondrial myopathy patients (40 ± 5 years, maximal whole-body oxygen uptake = 21...
February 8, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/28177718/the-physiological-response-to-cold-water-immersion-following-a-mixed-martial-arts-training-session
#14
Angus Lindsay, Sam Carr, Sean Cross, Carl Petersen, John G Lewis, Steven P Gieseg
Combative sport is one of the most physically intense forms of exercise, yet the effect of recovery interventions has been largely unexplored. We investigated the effect of cold water immersion on structural, inflammatory and physiological stress biomarkers following a mixed martial arts contest preparation training session in comparison to passive recovery. Semi-professional MMA competitors (n=15) were randomly assigned to a cold water immersion (15 min at 10°C) or passive recovery protocol (ambient air) completed immediately following a contest preparation training session...
January 17, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28177706/the-effects-of-acute-branched-chain-amino-acid-supplementation-on-recovery-from-a-single-bout-of-hypertrophy-exercise-in-resistance-trained-athletes
#15
Mark Waldron, Kieran Whelan, Owen Jeffries, Dean Burt, Louis Howe, Stephen David Patterson
This study investigated the effects of acute branched-chain amino acid (BCAA) supplementation on recovery from exercise-induced muscle damage, among experienced resistance-trained athletes. In a double-blind matched-pairs design, 16 resistance-trained participants, routinely performing hypertrophy training, were randomly assigned to a BCAA (n = 8) or placebo (n = 8) group. The BCAAs were administered at a dosage of 0.087 g/kg body mass, with a 2:1:1 ratio of leucine, isoleucine and valine. The participants performed 6 sets of 10 full-squats at 70 % 1RM to induce muscle damage...
January 27, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28167303/psychological-and-lifestyle-factors-that-influence-the-serial%C3%A2-reporting-of-postconcussion-like-symptoms-in-a-nonconcussed-population
#16
Arun Prasad Balasundaram, Josie Athens, Anthony Gerard Schneiders, Paul McCrory, Stephen John Sullivan
BACKGROUND: Symptoms related to concussion are generally found to be nonspecific in nature, as they are also reported by nonconcussed individuals. What is currently not known is whether the symptoms vary over time, and whether they are also influenced by a multitude of factors. OBJECTIVE: The aim of this study was to investigate the potential influence of psychological, lifestyle, and situational factors on the change in postconcussion-like symptoms reported over 7 consecutive days in a cohort of normal individuals...
February 4, 2017: PM & R: the Journal of Injury, Function, and Rehabilitation
https://www.readbyqxmd.com/read/28150163/fatigue-and-recovery-in-rugby-a-review
#17
REVIEW
Francisco Tavares, Tiaki Brett Smith, Matthew Driller
The physical demands and combative nature of rugby lead to notable levels of muscle damage. In professional rugby, athletes only have a limited timeframe to recover following training sessions and competition. Through the implementation of recovery strategies, sport scientists, practitioners and coaches have sought to reduce the effect of fatigue and allow athletes to recover faster. Although some studies demonstrate that recovery strategies are extensively used by rugby athletes, the research remains equivocal concerning the efficacy of recovery strategies in rugby...
February 2, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28149397/optimizing-post-activation-potentiation-for-explosive-activities-in-competitive-sports
#18
Artur Gołaś, Adam Maszczyk, Adam Zajac, Kazimierz Mikołajec, Petr Stastny
Post activation potentiation (PAP) has shown improved performance during movements requiring large muscular power output following contractions under near maximal load conditions. PAP can be described as an acute enhancement of performance or an enhancement of factors determining an explosive sports activity following a preload stimulus. In practice, PAP has been achieved by complex training, which involves a combination of a heavy loaded exercise followed by a biomechanically similar explosive activity, best if specific for a particular sport discipline...
September 1, 2016: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28149346/differences-in-physiological-responses-to-interval-training-in-cyclists-with-and-without-interval-training-experience
#19
Rafal Hebisz, Paulina Hebisz, Jacek Borkowski, Marek Zatoń
The aim of this study was to determine differences in glycolytic metabolite concentrations and work output in response to an all-out interval training session in 23 cyclists with at least 2 years of interval training experience (E) and those inexperienced (IE) in this form of training. The intervention involved subsequent sets of maximal intensity exercise on a cycle ergometer. Each set comprised four 30 s repetitions interspersed with 90 s recovery periods; sets were repeated when blood pH returned to 7.3...
April 1, 2016: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28135216/effects-of-hyperventilation-on-repeated-pedaling-sprint-performance-short-vs-long-intervention-duration
#20
Akihiro Sakamoto, Hisashi Naito, Chin-Moi Chow
Previously, hyperventilation (HV) induced respiratory alkalosis, implemented during the last 30-s of each 60-s recovery that separated repeated pedaling sprints, has been shown to attenuate performance decrement. The present study investigated whether the ergogenic effects of HV would hold if the HV duration was shortened or extended. Seventeen power-trained athletes performed 10-s × 10 sets of standing pedaling sprints on a cycle ergometer, with 60-s inter-set recovery and the load (kp) set at 0.075 × body mass, under three breathing conditions: control, HV of 15-s (HVshort), and HV of 45-s (HVlong)...
January 20, 2017: Journal of Strength and Conditioning Research
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