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https://www.readbyqxmd.com/read/28344459/applied-sports-nutrition-support-dietary-intake-and-body-composition-changes-of-a-female-athlete-completing-26-marathons-in-26-days-a-case-study
#1
Chris J McManus, Kelly A Murray, David A Parry
The aim of this case study is to describe the nutrition practices of a female recreational runner (VO2max 48.9 ml·kg(-1)·min(-1)) who completed 26 marathons (42.195 km) in 26 consecutive days. Information relating to the nutritional intake of female runners during multi-day endurance events is extremely limited, yet the number of people participating year-on-year continues to increase. This case study reports the nutrition intervention, dietary intake, body composition changes and performance in the lead-up and during the 26 days...
March 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28303909/sprint-interval-training-induces-a-sexual-dimorphism-but-does-not-improve-peak-bone-mass-in-young-and-healthy-mice
#2
Kathrin Koenen, Isabell Knepper, Madlen Klodt, Anja Osterberg, Ioannis Stratos, Thomas Mittlmeier, Tina Histing, Michael D Menger, Brigitte Vollmar, Sven Bruhn, Brigitte Müller-Hilke
Elevated peak bone mass in early adulthood reduces the risk for osteoporotic fractures at old age. As sports participation has been correlated with elevated peak bone masses, we aimed to establish a training program that would efficiently stimulate bone accrual in healthy young mice. We combined voluntary treadmill running with sprint interval training modalities that were tailored to the individual performance limits and were of either high or intermediate intensity. Adolescent male and female STR/ort mice underwent 8 weeks of training before the hind legs were analyzed for cortical and trabecular bone parameters and biomechanical strength...
March 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28301444/hemodynamic-and-cardiorespiratory-predictors-of-sport-rock-climbing-performance
#3
Simon Fryer, David Giles, Inmaculada Garrido Palomino, Alejandro de la O Puerta, Vanesa España Romero
Rock climbing performance has been suggested to involve a notable contribution from the aerobic metabolism. Previously it has been shown that forearm oxygenation kinetics can be used to distinguish ability groups and predict red-point sport climbing performance. Currently it is not known if forearm oxygenation kinetics, or a sport specific assessment of cardiorespiratory fitness best predicts sport rock climbing performance. The aim of the study was to determine whether forearm oxidative capacity index, maximal de-oxygenation (Δ score) during a treadwall V[Combining Dot Above]O[SUBSCRIPT TWO]peak test, treadwall V[Combining Dot Above]O[SUBSCRIPT TWO]peak, or running V[Combining Dot Above]O[SUBSCRIPT TWO]max best predicts self-reported sport climbing performance...
March 13, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28301436/the-effects-of-recovery-duration-during-high-intensity-interval-exercise-on-time-spent-at-high-rates-of-oxygen-consumption-oxygen-kinetics-and-blood-lactate
#4
Ilias Smilios, Aristides Myrkos, Andreas Zafeiridis, Argyris Toubekis, Apostolos Spassis, Savas P Tokmakidis
The recovery duration and the work to recovery ratio are important aspects to consider when designing a high-intensity aerobic interval exercise (HIIE). This study examined the effects of recovery duration on total exercise time performed above 80, 90 and 95% of maximum oxygen consumption (VO2max) and heart rate (HRmax) during a single-bout HIIE. We also evaluated the effects on VO2 and HR kinetics, blood lactate concentration and rating of perceived exertion (RPE). Eleven moderately trained males (22.1±1 yrs...
March 13, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28283992/training-load-monitoring-in-team-sports-a-novel-framework-separating-physiological-and-biomechanical-load-adaptation-pathways
#5
Jos Vanrenterghem, Niels Jensby Nedergaard, Mark A Robinson, Barry Drust
There have been considerable advances in monitoring training load in running-based team sports in recent years. Novel technologies nowadays offer ample opportunities to continuously monitor the activities of a player. These activities lead to internal biochemical stresses on the various physiological subsystems; however, they also cause internal mechanical stresses on the various musculoskeletal tissues. Based on the amount and periodization of these stresses, the subsystems and tissues adapt. Therefore, by monitoring external loads, one hopes to estimate internal loads to predict adaptation, through understanding the load-adaptation pathways...
March 10, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28277429/the-influence-of-exercise-to-rest-ratios-on-physical-and-physiological-performance-during-hurling-specific-small-sided-games
#6
Shane Malone, Brian Hughes, Kieran Collins
The current study examined the impact of different exercise to rest ratios on hurling specific small-sided games (SSG). Thirty-four (n = 34) hurling players were monitored during an in-season training period. Heart rate (Polar Electro Oy, Kempele, Finland) and global positioning system technology (VX Sport, 4-Hz, Lower Hutt, New Zealand) were used to analyse the physical and physiological differences between exercise to rest ratios across bouts of SSG. Total distance (m) high-speed distance (m) (≥17 km·h), very high-speed distance (≥22 km·h) (m), total accelerations (n), acceleration distance (m), peak velocity (km·h) and % maximum heart rate (%HRmax) were measured...
March 8, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28253034/playing-experience-and-position-influence-injury-risk-among-ncaa-division-i-collegiate-footballers
#7
Robert McCunn, Hugh H K Fullagar, Sean Williams, Travis J Halseth, John A Sampson, Andrew Murray
PURPOSE: American football is widely played by collegiate student-athletes throughout the United States; however, the associated injury risk is greater than in other team sports. Numerous factors likely contribute to this risk yet research identifying these risk factors is limited. The present study sought to explore the relationship between playing experience and position on injury risk within NCAA Division I collegiate footballers. METHODS: Seventy-six male collegiate student athletes within the American football program of an NCAA Division I university participated...
March 2, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28246070/accuracy-and-adoption-of-wearable-technology-used-by-active-citizens-a-marathon-event-field-study
#8
Monika Pobiruchin, Julian Suleder, Richard Zowalla, Martin Wiesner
BACKGROUND: Today, runners use wearable technology such as global positioning system (GPS)-enabled sport watches to track and optimize their training activities, for example, when participating in a road race event. For this purpose, an increasing amount of low-priced, consumer-oriented wearable devices are available. However, the variety of such devices is overwhelming. It is unclear which devices are used by active, healthy citizens and whether they can provide accurate tracking results in a diverse study population...
February 28, 2017: JMIR MHealth and UHealth
https://www.readbyqxmd.com/read/28240711/a-self-paced-team-sport-match-simulation-results-in-reductions-in-voluntary-activation-and-modifications-to-biological-perceptual-and-performance-measures-at-half-time-and-for-up-to-96-hours-post-match
#9
Paul Tofari, Justin Kemp, Stuart Cormack
Assessing responses to soccer match-play is limited by match variability or unrealistic simulations. To address this, the biological, perceptual, and performance response were assessed using a self-paced, simulated soccer match protocol using a non-motorized treadmill. Twelve male team-sport athletes performed the 90-min simulation. Match activity; quadriceps twitch interpolation [voluntary activation (%VA) and potentiated twitch (POT)]; biochemical markers; strength and power performance; rating of perceived exertion (RPE) and self-report wellness were collected pre-, half-time, post-, and 2, 24, 48, 72 and 96-h post-match...
February 23, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28229575/effects-of-a-low-volume-plyometric-training-in-anaerobic-performance-of-adolescent-athletes
#10
Ari R Assunção, Martim Bottaro, Euler A Cardoso, Daiane P Dantas da Silva, Marcelo Ferraz, Carlos A Vieira, Paulo Gentil
BACKGROUND: Parameters related to the anaerobic capacity and power may be important for the performance of many sports whose skills are related to high-intensity and short- duration efforts. Although plyometric training (PT) has been widely used in the regular strength and conditioning programs of young athletes, its effects on anaerobic performance are still controversial. Therefore, the purpose of the present study was to evaluate the effects of PT in anaerobic performance in young athletes...
February 22, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28224442/report-of-the-primary-outcomes-for-gait-mechanics-in-men-of-the-acl-sports-trial-secondary-prevention-with-and-without-perturbation-training-does-not-restore-gait-symmetry-in-men-1-or-2-years-after-acl-reconstruction
#11
Jacob John Capin, Ryan Zarzycki, Amelia Arundale, Kathleen Cummer, Lynn Snyder-Mackler
BACKGROUND: Movement asymmetries during walking are common after anterior cruciate ligament (ACL) injury and reconstruction and may influence the early development of posttraumatic osteoarthritis. Preoperative neuromuscular training (like perturbation training, which is neuromuscular training requiring selective muscle activation in response to surface perturbations) improves gait asymmetries and functional outcomes among people who are ACL-deficient, but the effect of postoperative perturbation training on gait mechanics after ACL reconstruction is unknown...
February 21, 2017: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/28094488/effects-of-leg-contrast-strength-training-on-sprint-agility-and-repeated-change-of-direction-performance-in-male-soccer-players
#12
Mehréz Hammami, Yassine Negra, Roy J Shephard, Mohamed Souhaiel Chelly
BACKGROUND: Contrast training is popular technique among individuals who are involved in dynamic sports, having as its goal an increase in dynamic muscular performance. It is characterized by the use of high and low loads in the same strength training session. The present investigation aimed to determine the effects of adding 8--weeks of contrast strength training (CSTP) to regular soccer practice in U--17 male soccer players during the competitive season. We hypothesized that CSTP would enhance their performance...
January 17, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28091446/correlation-between-athlete-training-intensity-and-cardiac-performance
#13
T Xiao, Y Zhang
OBJECTIVE: An effective analysis of correlation between training intensity of athletes and cardiac performance is done to develop scientific and reasonable exercise program and to promote health of athletes. METHODS: During December 2013-December 2015, 3600 students from different sports schools were selected for the test. All the athletes were randomly grouped, that is half-hour running group, one-hour running group and 90 -minute running group, which are named A, B, C groups respectively...
February 2017: Nigerian Journal of Clinical Practice
https://www.readbyqxmd.com/read/28028894/attacking-22-entries-in-rugby-union-running-demands-and-differences-between-successful-and-unsuccessful-entries
#14
P Tierney, D P Tobin, C Blake, E Delahunt
Global Positioning System (GPS) technology is commonly utilized in team sports, including rugby union. It has been used to describe the average running demands of rugby union. This has afforded an enhanced understanding of the physical fitness requirements for players. However, research in team sports has suggested that training players relative to average demands may underprepare them for certain scenarios within the game. To date, no research has investigated the running demands of attacking 22 entries in rugby union...
December 28, 2016: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28002177/selected-physiological-perceptual-and-physical-performance-changes-during-two-bouts-of-prolonged-high-intensity-intermittent-running-separated-by-72-hours
#15
Nicholas Dobbin, Kevin Lamb, Craig Twist
This study investigated the effects of performing a second 90-minute intermittent running protocol 72 hours after an initial trial on selected physiological, perceptual and sprint running measures. Eight sub-elite soccer players provided measures of isokinetic muscle function, counter-movement jump (CMJ), 10 m sprinting, and muscle soreness before, and at 0, 24, 48 and 72 h after a 90-minute intermittent high intensity running bout (IHIR 1). A second 90-minute intermittent high intensity running bout (IHIR 2) was performed 72 h after the first...
December 8, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27999729/a-non-operative-approach-to-the-management-of-chronic-exertional-compartment-syndrome-in-a-triathlete-a-case-report
#16
Cristiana Kahl Collins, Brad Gilden
BACKGROUND & PURPOSE: Chronic Exertional Compartment Syndrome (CECS) causes significant exercise related pain secondary to increased intra-compartmental pressure (ICP) in the lower extremities. CECS is most often treated with surgery with minimal information available on non-operative approaches to care. This case report presents a case of CECS successfully managed with physical therapy. STUDY DESIGN: Case report. CASE DESCRIPTION: A 34-year-old competitive triathlete experienced bilateral anterior and posterior lower leg pain measured with a numerical pain rating scale of 7/10 at two miles of running...
December 2016: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/27992260/a-three-week-unexpected-disturbance-program-improves-physical-performance-of-elite-female-athletes
#17
Jorg Teichmann, Edin K Suwarganda, C Martyn Beaven, Kim Hébert-Losier, Lee Jin Wei, Florencio Tenllado Vallejo, Philip Lew Chun Foong, Ramlan Abdul Aziz, Yeo Wee Kian, Dietmar Schmidtbleicher
CONTEXT: Sensorimotor training is commonly used in a rehabilitative setting; however, the effectiveness of an unexpected disturbance program (UDP) to enhance performance measures in uninjured elite athletes is unknown. OBJECTIVE: To assess the impact of a three-week UDP program on strength, power, and proprioceptive measures. DESIGN: Matched-group, pre- post design. SETTING: National Sports Institute. PARTICIPANTS: Twenty-one international-level female field hockey athletes...
December 19, 2016: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/27977300/preventive-neuromuscular-training-for-young-female-athletes-comparison-of-coach-and-athlete-compliance-rates
#18
RANDOMIZED CONTROLLED TRIAL
Dai Sugimoto, Carl G Mattacola, Heather M Bush, Staci M Thomas, Kim D Barber Foss, Gregory D Myer, Timothy E Hewett
CONTEXT:  Fewer athletic injuries and lower anterior cruciate ligament injury incidence rates were noted in studies of neuromuscular-training (NMT) interventions that had high compliance rates. However, several groups have demonstrated that preventive NMT interventions were limited by low compliance rates. OBJECTIVE:  To descriptively analyze coach and athlete compliance with preventive NMT and compare the compliance between study arms as well as among school levels and sports...
January 2017: Journal of Athletic Training
https://www.readbyqxmd.com/read/27928207/the-agt-gene-m235t-polymorphism-and-response-of-power-related-variables-to-aerobic-training
#19
Zarębska Aleksandra, Jastrzębski Zbigniew, Moska Waldemar, Leońska-Duniec Agata, Kaczmarczyk Mariusz, Sawczuk Marek, Maciejewska-Skrendo Agnieszka, Żmijewski Piotr, Ficek Krzysztof, Trybek Grzegorz, Lulińska-Kuklik Ewelina, Ekaterina A Semenova, Ildus I Ahmetov, Cięszczyk Paweł
The C allele of the M235T (rs699) polymorphism of the AGT gene correlates with higher levels of angiotensin II and has been associated with power and strength sport performance. The aim of the study was to investigate whether or not selected power-related variables and their response to a 12-week program of aerobic dance training are modulated by the AGT M235T genotype in healthy participants. Two hundred and one Polish Caucasian women aged 21 ± 1 years met the inclusion criteria and were included in the study...
December 2016: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/27918675/biomechanics-in-paralympics-implications-for-performance
#20
Floor Morriën, Matthew J D Taylor, Florentina J Hettinga
PURPOSE: To provide an overview of biomechanical studies in Paralympic research and their relevance for performance in Paralympic sports. METHODS: Search terms ' Paralympic Biomechanics', 'Paralympic Sport Performance', 'Paralympic Athlete Performance', and Paralympic Athlete' were entered into the electronic database PubMed. RESULTS: Thirty-four studies were included. Biomechanical studies in Paralympics mainly contributed to performance enhancement by technical optimization (n=32) and/or injury prevention (n=6)...
December 5, 2016: International Journal of Sports Physiology and Performance
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