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https://www.readbyqxmd.com/read/28930880/cycling-power-outputs-predict-functional-threshold-power-and-maximum-oxygen-uptake
#1
Joshua Denham, John Scott-Hamilton, Amanda D Hagstrom, Adrian J Gray
Functional threshold power (FTP) has emerged as a correlate of lactate threshold and is commonly assessed by recreational and professional cyclists for tailored exercise programing. To identify whether results from traditional aerobic and anaerobic cycling tests could predict FTP and V˙ O2max, we analysed the association between estimated FTP, maximum oxygen uptake (V˙ O2max [mlkgmin]) and power outputs obtained from a maximal cycle ergometry cardiopulmonary exercise test (CPET) and a 30-s Wingate test in a heterogeneous cohort of cycle-trained and untrained individuals (N=40, mean±SD; age: 32...
September 11, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28930877/the-impact-of-exercise-induced-muscle-damage-on-performance-test-outcomes-in-elite-female-basketball-players
#2
Kenji Doma, Anthony Leicht, Wade Sinclair, Moritz Schumann, Felipe Damas, Dean Burt, Carl Woods
The purpose of this study was two-fold. First, to examine the impact exercise-induced muscle damage (EIMD) on physical fitness qualities following a basketball-specific training session. Secondly, to determine the reproducibility of the sport-specific performance measures in elite female basketball players. Ten elite female basketball players (age 25.6 ± 4.5 years; height 1.8 ± 0.7m; body mass 76.7 ± 8.3kg) undertook a 90-minute training session involving repeated jumping, sprinting and game-simulated training...
September 11, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28930875/the-kinetic-determinants-of-reactive-strength-in-highly-trained-sprint-athletes
#3
Jamie Douglas, Simon Pearson, Angus Ross, Mike McGuigan
The purpose of this study was to determine the braking and propulsive phase kinetic variables underpinning reactive strength in highly trained sprint athletes in comparison to a non-sprint trained control group. Twelve highly trained sprint athletes and twelve non-sprint trained participants performed drop jumps (DJs) from 0.25m, 0.50m and 0.75m onto a force plate. One familiarization session was followed by an experimental testing session within the same week. Reactive strength index (RSI), contact time, flight time, and leg stiffness were determined...
September 11, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28930869/quantifying-the-external-and-internal-loads-of-professional-rugby-league-training-modes-consideration-for-concurrent-field-based-training-prescription
#4
Dan Weaving, Ben Jones, Kevin Till, Phil Marshall, Keith Earle, Grant Abt
Practitioners prescribe numerous training modes to develop the varied physical qualities professional rugby league players must express during competition. The aim of the current study was to determine how the magnitude of external and internal training load per minute of time differs between modes in professional rugby league players. This data were collected from 17 players across 716 individual sessions (mean (SD) sessions: 42 (13) per player) which were categorised by mode (conditioning, small sided games, skills and sprint training)...
September 11, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28930362/rapid-development-of-specialty-population-registries-and-quality-measures-from-electronic-health-record-data-an-agile-framework
#5
Vaishnavi Kannan, Jason S Fish, Jacqueline M Mutz, Angela R Carrington, Ki Lai, Lisa S Davis, Josh E Youngblood, Mark R Rauschuber, Kathryn A Flores, Evan J Sara, Deepa G Bhat, DuWayne L Willett
BACKGROUND: Creation of a new electronic health record (EHR)-based registry often can be a "one-off" complex endeavor: first developing new EHR data collection and clinical decision support tools, followed by developing registry-specific data extractions from the EHR for analysis. Each development phase typically has its own long development and testing time, leading to a prolonged overall cycle time for delivering one functioning registry with companion reporting into production. The next registry request then starts from scratch...
June 14, 2017: Methods of Information in Medicine
https://www.readbyqxmd.com/read/28929343/a-comparison-of-isomaltulose-versus-maltodextrin-ingestion-during-soccer-specific-exercise
#6
Emma J Stevenson, Anthony Watson, Stephan Theis, Anja Holz, Liam D Harper, Mark Russell
PURPOSE: The performance and physiological effects of isomaltulose and maltodextrin consumed intermittently during prolonged soccer-specific exercise were investigated. METHODS: University soccer players (n = 22) performed 120 min of intermittent exercise while consuming 8% carbohydrate-electrolyte drinks (equivalent to ~ 20 g h(-1)) containing maltodextrin (Glycaemic Index: 90-100), isomaltulose (Glycaemic Index: 32) or a carbohydrate-energy-free placebo in a manner replicating the practices of soccer players (i...
September 19, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28918791/-periostal-avulsion-of-m-vastus-medialis-in-a-triathlete-during-competition
#7
Rikard Ohlsson, Firas Mahdi, Jens Lykkegaard Olesen
Periostal avulsion of m. vastus medialis is a very rare injury. To our knowledge, it has not previously been described, and there is no treatment algorithm. A 32-year-old male professional triathlete experienced this type of injury during a final sprint in a competition. He achieved a good functional result after treatment with an optimal rehabilitation regimen, and approximately four months after the injury he won a medal in a major international event.
September 18, 2017: Ugeskrift for Laeger
https://www.readbyqxmd.com/read/28916706/the-expression-of-ldh-c-in-the-skeletal-muscle-of-plateau-pika-ochotona-curzoniae-enhances-adaptation-to-a-hypoxic-environment
#8
Zhi F An, Deng B Wei, Lian Wei, Yang Wang, Lin N Wei
The plateau pika (Ochotona curzoniae) is a species of sprint-running alpine animals in the Qinghai-Tibet Plateau, which is a harsh highland hypoxic environment. Ldh-c is expressed in the testis, sperm and somatic tissues of plateau pika. To reveal the role and physiological mechanisms of sperm-specific lactate dehydrogenase (LDH-C4), in plateau pika to adapt to hypoxic environment, an adenoviral line of pMultiRNAi-Ldhc was constructed and injected into the bilateral biceps femoris of the hind legs. The swimming times of the pikas, and the Ldh-c expression levels, total LDH activities and ATP levels in skeletal muscle, were measured after the pikas were raised in the trapped site for 5 days...
September 15, 2017: Biology Open
https://www.readbyqxmd.com/read/28915864/physical-fitness-and-anthropometric-characteristics-among-adolescents-living-in-urban-or-rural-areas-of-kosovo
#9
Faton Tishukaj, Ismet Shalaj, Masar Gjaka, Besim Ademi, Rrustem Ahmetxhekaj, Norbert Bachl, Harald Tschan, Barbara Wessner
BACKGROUND: High physical fitness levels in childhood and adolescence are associated with positive health-related outcomes later in life. Albeit many researchers investigated rural-urban differences in physical fitness, the outcomes of these studies are inconsistent and data on Kosovo are widely missing. Thus, this study aims to examine anthropometric and physical fitness parameters in 14 to 15 year old Kosovan adolescents living in rural and urban areas. METHODS: Two schools from Pristina (mostly urban population) and two schools in the surrounding villages of the district of Deçan (mostly rural population) were selected...
September 16, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28912725/enhanced-strength-and-sprint-levels-and-changes-in-blood-parameters-during-a-complete-athletics-season-in-800-m-high-level-athletes
#10
Beatriz Bachero-Mena, Fernando Pareja-Blanco, Juan J González-Badillo
The purpose of this study was to analyze changes in sprint, strength, hematological, and hormonal parameters in high-level 800 m athletes during a complete athletics season. Thirteen male athletes of national and international level in 800 m (personal best ranging from 1:43 to 1:58 min:ss) participated in this study. A total of 5 tests were conducted during a complete athletics season. Athletes performed sprint tests (20 and 200 m), countermovement jump (CMJ), jump squat (JS), and full squat (SQ) tests. Blood samples (red and white blood profile) and hormones were collected in test 1 (T1), test 3 (T3), and test 5 (T5)...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28912649/does-live-high-train-low-and-high-hypoxic-training-alter-running-mechanics-in-elite-team-sport-players
#11
Olivier Girard, Grégoire P Millet, Jean-Benoit Morin, Franck Brocherie
This study aimed to investigate if "Live High-Train Low (and High)" hypoxic training alters constant-velocity running mechanics. While residing under normobaric hypoxia (≥14 h·d(-1); FiO2 14.5-14.2%) for 14 days, twenty field hockey players performed, in addition to their usual training in normoxia, six sessions (4 × 5 × 5-s maximal sprints; 25 s passive recovery; 5 min rest) under either normobaric hypoxia (FiO2 ~14.5%, n = 9) or normoxia (FiO2 20.9%, n = 11). Before and immediately after the intervention, their running pattern was assessed at 10 and 15 km·h(-1) as well as during six 30-s runs at ~20 km·h(-1) with 30-s passive recovery on an instrumented motorised treadmill...
September 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28903011/inter-individual-responses-to-sprint-interval-training-a-pilot-study-investigating-interactions-with-the-sirtuin-system
#12
Stuart R Gray, Tom P Aird, Andrew J Farquharson, Graham W Horgan, Emily Fisher, John Wilson, Gareth E Hopkins, Bradley Anderson, Syed A Ahmad, Stuart R Davis, Janice E Drew
Sprint intensity interval training (SIT) is reported to improve blood glucose control and may be a useful public health tool. The sirtuins and associated genes are emerging as key players in blood glucose control. This study investigated the interplay between the sirtuin/NAD system and individual variation in insulin sensitivity responses after SIT in young healthy individuals. Before and after 4 weeks of SIT body mass and fat percentage were measured and oral glucose tolerance tests (OGTT) performed in 20 young healthy participants (7 females)...
September 13, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28902118/concurrent-training-followed-by-detraining-does-the-resistance-training-intensity-matter
#13
António C Sousa, Daniel A Marinho, Maria H Gil, Mikel Izquierdo, David Rodríguez-Rosell, Henrique P Neiva, Mário C Marques
The aim of the present study was to analyze the training and detraining effects of concurrent aerobic training and resistance training against three different external loads on strength and aerobic variables. Thirty-two men were randomly assigned to four groups: low-load (LLG, n=9), moderate-load (MLG, n=9), high-load (HLG, n=8), and control group (CG, n=6). Resistance training consisted of FS with a low-load (40-55% 1RM), a moderate-load (55-70% 1RM) or a high-load (70-85% 1RM) combined with jump and sprint exercises...
September 6, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28902116/adding-whole-body-vibration-to-preconditioning-squat-exercise-increases-cycling-sprint-performance
#14
Sébastien Duc, Bent R Rønnestad, William Bertucci
This study investigated the effect of performing a preconditioning exercise with or without whole-body vibration (WBV) on a subsequent cycling sprint performance. Fourteen trained subjects performed two separate test sessions in randomized order. After a warm-up, the preconditioning exercise (body-loaded half squats) was applied: 30-seconds of half-squats with WBV (40 Hz, 2 mm) or 30-seconds of half-squats without WBV with a 10-second all-out sprint performed after one minute. Surface electromyography (EMG) was measured from the vastus medialis, vastus lateralis and gastrocnemius medialis during the sprints...
September 6, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28902114/effects-of-repeated-sprints-with-changes-of-direction-on-youth-soccer-player-s-performance-impact-of-initial-fitness-level
#15
Fábio Y Nakamura, Javier Sanchez-Sanchez, Rodrigo Ramirez-Campillo, Cristina Petisco, Oliver Gonzalo-Skok, Alejandro Rodriguez-Fernandez, Javier Miñano
The aim of this study was to assess the effect of an 8-week repeated sprint with change of direction training program on repeated sprint, intermittent endurance and change of direction performance in youth soccer players with different aerobic fitness levels. Athletes were randomly assigned into a soccer-only (n=9; age, 14.9±0.4 yr) and soccer plus repeated sprint with change of direction (RS-COD) training programs for players with high (n=10; age, 14.4±0.5 yr) and low (n=10; age, 14.4±0.5 yr) aerobic fitness...
September 6, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28902113/comparative-effects-of-two-interval-shuttle-run-training-modes-on-physiological-and-performance-adaptations-in-female-professional-futsal-players
#16
Anderson S Teixeira, Francimara B Arins, Ricardo D De Lucas, Lorival J Carminatti, Naiandra Dittrich, Fábio Yuzo Nakamura, Luiz Guilherme A Guglielmo
The purpose of the present study was to analyze the effects of two shuttle-run interval training (SRIT) models with one and three directional changes per running bout on the aerobic and anaerobic performances of elite female futsal players. Sixteen players competing in the Brazilian National Division League took part in the study. The training protocols consisted of shuttle-run intervals organized in four sets of 4-min bouts with 3- min of rest intervals between the sets. The SRIT models were composed of one (7...
September 6, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28902111/the-influence-of-foam-rolling-on-recovery-from-exercise-induced-muscle-damage
#17
Anthony P D'Amico, Jason Gillis
The purpose of this study was to examine the impact of foam rolling (FR) on recovery from exercise-induced muscle damage (EIMD). Thirty-seven males performed 40 x 15 m sprints, inducing muscle damage. Immediately following sprinting and in the four days following, perceived muscle soreness, hip abduction range of motion (ROM), hamstring muscle length, vertical jump, and agility measures were recorded. Eighteen subjects (mean ± sd; age 22.4 ± 2.0 yrs; BMI 26.9 ± 4.2 kgm) foam rolled prior to testing each day (FR), while 19 (mean ± sd; age 23...
September 6, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28902109/validity-and-reliability-of-the-stages-cycling-power-meter
#18
Cyril Granier, Christophe Hausswirth, Sylvain Dorel, Le Meur Yann
PURPOSE: This study aimed to determine the validity and the reliability of the Stages power meter crank system (Boulder, United States) during several laboratory cycling tasks. METHODS: Eleven trained participants completed laboratory cycling trials on an indoor cycle fitted with SRM Professional and Stages systems. The trials consisted of an incremental test at 100W, 200W, 300W, 400W and four 7s sprints. The level of pedaling asymmetry was determined for each cycling intensity during a similar protocol completed on a Lode Excalibur Sport ergometer...
September 6, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28902107/reliability-of-the-maximal-resisted-sprint-load-test-and-relationships-with-performance-measures-and-anthropometric-profile-in-female-field-sport-athletes
#19
George Petrakos, Nicola C Tynan, Adam M Vallely-Farrell, Cillian Kiely, Abdelhak Boudhar, Brendan Egan
Resisted sled sprint (RSS) training is an effective modality for the improvement of linear sprint speed. Previous methods of RSS load prescription e.g. an absolute load or as a percentage of body mass (%BM), do not account for inter-individual differences in strength, power or speed characteristics, although the 'maximum resisted sled load' (MRSL) method of RSS load prescription may provide a solution. MRSL is defined as the final RSS load before an athlete can no longer accelerate between two phases (10-15 m and 15-20 m) of a 20 m linear sprint...
September 6, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28900862/the-influence-of-growth-and-maturation-on-stretch-shortening-cycle-function-in-youth
#20
REVIEW
John M Radnor, Jon L Oliver, Charlie M Waugh, Gregory D Myer, Isabel S Moore, Rhodri S Lloyd
Hopping, skipping, jumping and sprinting are common tasks in both active play and competitive sports. These movements utilise the stretch-shortening cycle (SSC), which is considered a naturally occurring muscle action for most forms of human locomotion. This muscle action results in more efficient movements and helps optimise relative force generated per motor unit recruited. Innate SSC development throughout childhood and adolescence enables children to increase power (jump higher and sprint faster) as they mature...
September 12, 2017: Sports Medicine
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