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https://www.readbyqxmd.com/read/29665614/vo2max-testing-in-trail-runners-is-there-a-specific-exercise-test-protocol
#1
Volker Scheer, Katharina Ramme, Claus Reinsberger, Hans-Christian Heitkamp
Trail running places specific physiological demands on the human body due to its uphill and downhill running sections. We developed and investigated a more sport-specific trail exercise test protocol (inclination and speed incremental protocol), and compared it to two standard exercise test protocols (horizontal step and ramp protocol) in thirteen highly trained trail runners (age 31±6 years, height 179±6.4 cm, weight 69.2±7.9 kg, BMI 21.6±2.1 kg/m2 ). The maximum oxygen uptake (VO2 max) measured during the trail test (62...
April 17, 2018: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/29663075/comparison-of-running-and-cycling-economy-in-runners-cyclists-and-triathletes
#2
Wannes Swinnen, Shalaya Kipp, Rodger Kram
PURPOSE: Exercise economy is one of the main physiological factors determining performance in endurance sports. Running economy (RE) can be improved with running-specific training, while the improvement of cycling economy (CE) with cycling-specific training is controversial. We investigated whether exercise economy reflects sport-specific skills/adaptations or is determined by overall physiological factors. METHODS: We compared RE and CE in 10 runners, 9 cyclists and 9 triathletes for running at 12 km/h and cycling at 200 W...
April 16, 2018: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29651908/design-of-eccentric-training-system-based-on-multiple-input-single-output-miso-wiener-nonlinear-model
#3
Chunbo Liu
The efficacy of eccentric cycling has been proved in research, clinical and sport training activities. However, several constraints make it difficult to use commercially available eccentric cycle ergometers. In this study, the multiple-input single-output (MISO) Wiener nonlinear model was applied to the design of eccentric training system. Particle Swarm Optimization (PSO) algorithm was then applied to identify the parameters of the MISO Wiener nonlinear model. The correlation coefficient of 0.9985 and root mean square error of 3...
April 13, 2018: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/29621810/-secondary-full-title-effects-of-high-intensity-interval-training-in-plain-and-uphill-regarding-physical-performance
#4
Natalie Marterer, Verena Menz, Martin Burtscher
BACKGROUND:  As the number of HIITs is increasing in competitive and non-competitive sports, the risk of injuries and overload is increasing. There are no scientific data to support specific recommendations in regard to intensity, duration, number of intervals and gradient for HIIT that result in improved muscular parameters in athletes. Therefore the aim of this study was to compare HIIT in plain and uphill exercise, with respect to exercise tolerance and improvements in performance (VO2max and 800 m running time in the plain and uphill)...
April 5, 2018: Sportverletzung Sportschaden: Organ der Gesellschaft Für Orthopädisch-Traumatologische Sportmedizin
https://www.readbyqxmd.com/read/29621279/assessing-worst-case-scenarios-in-movement-demands-derived-from-global-positioning-systems-during-international-rugby-union-matches-rolling-averages-versus-fixed-length-epochs
#5
Daniel J Cunningham, David A Shearer, Neil Carter, Scott Drawer, Ben Pollard, Mark Bennett, Robin Eager, Christian J Cook, John Farrell, Mark Russell, Liam P Kilduff
The assessment of competitive movement demands in team sports has traditionally relied upon global positioning system (GPS) analyses presented as fixed-time epochs (e.g., 5-40 min). More recently, presenting game data as a rolling average has become prevalent due to concerns over a loss of sampling resolution associated with the windowing of data over fixed periods. Accordingly, this study compared rolling average (ROLL) and fixed-time (FIXED) epochs for quantifying the peak movement demands of international rugby union match-play as a function of playing position...
2018: PloS One
https://www.readbyqxmd.com/read/29607462/injury-prevalence-across-sports-a-descriptive-analysis-on-a-representative-sample-of-the-danish-population
#6
A M Bueno, M Pilgaard, A Hulme, P Forsberg, D Ramskov, C Damsted, R O Nielsen
BACKGROUND: Physical activity plays an important role in public health, owing to a range of health-related benefits that it provides. Sports-related injuries are known to be an important barrier to continued physical activity. Still, the prevalence of injuries on a general population level has not yet been explored in a descriptive epidemiological investigation. The purpose of the questionnaire-based study, therefore, was to describe the prevalence of injury in a representative sample of the Danish population...
April 2, 2018: Injury Epidemiology
https://www.readbyqxmd.com/read/29599724/age-predicted-maximal-heart-rate-in-recreational-marathon-runners-a-cross-sectional-study-on-fox-s-and-tanaka-s-equations
#7
Pantelis T Nikolaidis, Thomas Rosemann, Beat Knechtle
Age-based prediction equations of maximal heart rate (HRmax ), such as the popular formulas Fox's 220-age, or Tanaka's 208-0.7 × age, have been widely used in various populations. Surprisingly, so far these equations have not been validated in marathon runners, despite the importance of the role of HRmax for training purposes in endurance running. The aim of the present study was to examine the validity of Fox and Tanaka equations in a large sample of women and men recreational marathon runners. Participants ( n = 180, age 43...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29584528/the-cortisol-awakening-response-is-associated-with-training-load-in-endurance-runners
#8
Travis Anderson, Amy R Lane, Anthony C Hackney
The cortisol awakening response (CAR) is commonly used as a marker of psychological stress, however it is unknown whether CAR is affected by regular physical exercise induced stress. PURPOSE: Therefore, the purpose of this study was to assess the relationship between training load and CAR. METHODS: Recreational endurance athletes were recruited from local club running groups. Subjects (n = 15) completed training logs for two weeks, with various training loads, including psychometric analysis (RESTQ-Sport)...
March 27, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29559318/the-ball-in-play-demands-of-international-rugby-union
#9
Benjamin T Pollard, Anthony N Turner, Robin Eager, Daniel J Cunningham, Christian J Cook, Patrick Hogben, Liam P Kilduff
OBJECTIVES: Rugby union is a high intensity intermittent sport, typically analysed via set time periods or rolling average methods. This study reports the demands of international rugby union via global positioning system (GPS) metrics expressed as mean ball in play (BiP), maximum BiP (max BiP), and whole match outputs. DESIGN: Single cohort cross sectional study involving 22 international players, categorised as forwards and backs. METHODS: A total of 88 GPS files from eight international test matches were collected during 2016...
March 3, 2018: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29559317/the-associations-between-training-load-and-baseline-characteristics-on-musculoskeletal-injury-and-pain-in-endurance-sport-populations-a-systematic-review
#10
REVIEW
R Johnston, R Cahalan, M O'Keeffe, K O'Sullivan, T Comyns
OBJECTIVES: To determine the associations between training load, baseline characteristics (e.g. age or previous injury) and rate of musculoskeletal injury and/or pain specifically within an Endurance Sporting Population (ESP). DESIGN: Prospectively registered systematic review. METHODS: Eight electronic databases were searched by two independent reviewers. Studies were required to prospectively monitor both (i) training loads and (ii) musculoskeletal injury and/or pain for >3 months...
March 14, 2018: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29552736/urinary-incontinence-in-female-athletes-a-systematic-review
#11
Thais Regina de Mattos Lourenco, Priscila Katsumi Matsuoka, Edmund Chada Baracat, Jorge Milhem Haddad
INTRODUCTION AND HYPOTHESIS: People are increasingly aware of healthy lifestyles. Extenuating practice can injure the pelvic floor. Urinary incontinence (UI) is a prevalent condition in women whether they exercise professionally or not. The most common symptom is stress UI. It is reported in a large variety of sports and may interfere with everyday life or training, leading athletes to change or compromise their performance or risk compromising it. We aimed to assess the prevalence of UI in female athletes and to determine whether the type of sport might also influence UI...
March 19, 2018: International Urogynecology Journal
https://www.readbyqxmd.com/read/29552503/sprint-cycling-training-improves-intermittent-run-performance
#12
Hardaway Chun-Kwan Chan, Weeraya Ka-Yan Ho, Patrick Shu-Hang Yung
Background/Objective: The aim of this study was to examine the effect of sprint cycling training on the intermittent run performance, sprinting speed, and change of direction (COD) ability of recreational intermittent sports athletes. Methods: Sixteen participants participated in the study. The experimental group (EG, n = 8) received a total of 12 sessions of sprint cycling training in a 4-week period and the control group (CG, n = 8) received no training. Both EG and CG were instructed to maintain their daily activity during the 4-week period...
January 2018: Asia-Pacific Journal of Sports Medicine, Arthroscopy, Rehabilitation and Technology
https://www.readbyqxmd.com/read/29541343/evaluating-energy-expenditure-estimated-by-wearable-technology-during-variable-intensity-activity-on-female-collegiate-athletes
#13
Monica Taylor, Elizabeth F Nagle, Fredric L Goss, Elaine N Rubinstein, Andrew Simonson
Monitoring an athlete's energy intake and energy expenditure (EE) is an important consideration of nutritional planning for sport conditioning and peak performance. In order to provide appropriate recommendations regarding nutritional requirements and caloric needs, an accurate determination of energy requirements is necessary. By knowing an individual's EE, a coach, athletic performance staff or trainer can effectively determine training loads and volumes necessary for periodization and seasonal planning for a particular sport...
2018: International Journal of Exercise Science
https://www.readbyqxmd.com/read/29533361/an-investigation-in-to-the-positional-running-demands-of-elite-gaelic-football-players-how-competition-data-can-inform-training-practice
#14
Jason McGahan, Con Burns, Seán Lacey, Tim Gabbett, Cian O' Neill
PURPOSE: This study investigated the positional running demands of elite Gaelic football players during match-play and compared these demands with typical training activities used to prepare players for competition. METHODS: Global positioning system (GPS) data was obtained from thirty elite Gaelic football players (26.9 ± 3.5 years, 182.8 ± 6.1 cm, 84.6 ± 8.1 kg) across a full season (13 competitive games and 78 training sessions). Only players who completed the full match and respective training sessions were included (n = 107 match files and n = 1,603 training files)...
March 12, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29526409/marked-asymmetry-in-vertical-force-but-not-contact-times-during-running-in-acl-reconstructed-athletes-9-months-post-surgery-despite-meeting-functional-criteria-for-return-to-sport
#15
Athol Thomson, Einar Einarsson, Clint Hansen, Chris Bleakley, Rod Whiteley
OBJECTIVES: Compare maximum plantar force (Fmax) during running in soccer players following anterior cruciate ligament reconstruction (ACLR) as they pass return to sport (RTS) criteria. DESIGN: Case control study. METHODS: Soccer players after ACLR (n=16) and matched healthy controls (n=16) ran on a treadmill at 12, 14 and 16km/h while plantar loading data was measured using an in-shoe pressure system (Pedar-X, Novel). Fmax and contact time of the injured and uninjured limbs in athletes <9months post-ACLR and those ≥9months ACLR were compared to healthy players (no ACLR)...
March 1, 2018: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29517811/the-use-of-a-rein-tension-device-to-compare-different-training-methods-for-neck-flexion-in-base-level-trained-warmblood-horses-at-the-walk
#16
Iris Veen, D Killian, L Vlaminck, J C M Vernooij, W Back
BACKGROUND: Debate surrounds the use of high rein tension for obtaining different head and neck positions in the training of sport horses on account of possible welfare issues. OBJECTIVES: To compare auxiliary rein tension in two methods for obtaining a standardized head and neck position on a hard and a soft surface; Draw Reins and Concord Leader. STUDY DESIGN: Intervention study. METHODS: Left and right rein tensions were measured in 11 base-level trained client-owned sport horses (mean age ± standard deviation: 10 ± 3...
March 8, 2018: Equine Veterinary Journal
https://www.readbyqxmd.com/read/29511660/sprint-interval-training-on-the-vertical-treadmill-improves-aerobic-and-anaerobic-running-performance
#17
Alastair Ross Jordan, David Claxton, Alison Purvis, Andrew Barnes, Mary Fysh
The vertical treadmill (VertiRun) is an unresearched mode of exercise where users engage in a "running-like" action whilst body weight is supported by a recumbent bench and overhanging resistance cables are tethered to the user's ankles. The purpose of this study was to determine the effects of training on a VertiRun and any cross-training effect on running performance. Thirty active males (age, 22±4 years; stature, 1.79±0.08 m; body mass, 78.5±12.6 kg) volunteered for this study. Participants' aerobic and anaerobic running performance were determined by incremental maximum rate of oxygen consumption (VO2max) treadmill test and a maximum anaerobic running test (MART), respectively...
February 2018: Journal of Exercise Rehabilitation
https://www.readbyqxmd.com/read/29498028/a-new-direction-to-athletic-performance-understanding-the-acute-and-longitudinal-responses-to-backward-running
#18
REVIEW
Aaron Uthoff, Jon Oliver, John Cronin, Craig Harrison, Paul Winwood
Backward running (BR) is a form of locomotion that occurs in short bursts during many overground field and court sports. It has also traditionally been used in clinical settings as a method to rehabilitate lower body injuries. Comparisons between BR and forward running (FR) have led to the discovery that both may be generated by the same neural circuitry. Comparisons of the acute responses to FR reveal that BR is characterised by a smaller ratio of braking to propulsive forces, increased step frequency, decreased step length, increased muscle activity and reliance on isometric and concentric muscle actions...
March 1, 2018: Sports Medicine
https://www.readbyqxmd.com/read/29477554/blood-flow-restriction-training-after-achilles-tendon-rupture
#19
Bobby G Yow, David J Tennent, Thomas C Dowd, Jeremy P Loenneke, Johnny G Owens
Blood flow restriction (BFR) training is a technique shown to be safe and effective at increasing muscular strength and endurance in healthy fitness populations and is under study for its use in postinjury rehabilitation. BFR stimulates muscular strength and hypertrophy gains at much lower loads than traditional methods, allowing patients to begin the rehabilitation process much sooner. We report on 2 patients who incorporated BFR training into their traditional rehabilitation program after Achilles tendon ruptures...
February 21, 2018: Journal of Foot and Ankle Surgery: Official Publication of the American College of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/29461414/validity-and-reliability-of-an-on-court-fitness-test-for-assessing-and-monitoring-aerobic-fitness-in-squash
#20
Carl Alexander James, Florencio Tenllado Vallejo, Melvin Kantebeen, Saro Farra
Current on-court assessments of aerobic fitness in squash are not designed to yield a wealth of physiological data. Moreover, tests may require complex computer equipment or involve simulated racket strokes, which are difficult to standardize at high intensities. This study investigated the validity and reliability of a squash-specific fitness test which can yield both a standalone performance score, as well as pertinent physiological markers such as V[Combining Dot Above]O2max, the lactate turnpoint and oxygen cost, in a sport-specific environment...
February 14, 2018: Journal of Strength and Conditioning Research
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