The purpose of this investigation was to analyse the concurrent validity and reliability an iPhone app (called: My Jump) for measuring vertical jump performance. Twenty recreationally active healthy men (age: 22.1 ± 3.6 years) completed five maximal countermovement jumps, which were evaluated using a force platform (time in air method) specially designed app. developed calculate height from flight time high-speed video recording facility on 5 s. Jump heights 100 jumps measured, both devices,...

Sleep is known to be an important component of recovery from training, yet little about the quality and quantity sleep achieved by elite athletes. The aim present study was quantify in athletes using wristwatch actigraphy. Individual nights a cohort Olympic (n = 47) various sports were analysed compared non-athletic controls 20). There significant differences between all measures apart 'time asleep' (p 0.27), suggesting poorer characteristics athlete group. effect gender on awake' (mean...

Glaister, M, Howatson, G, Pattison, JR, and McInnes, G. The reliability validity of fatigue measures during multiple-sprint work: an issue revisited. J Strength Cond Res 22(5): 1597-1601, 2008-The ability to repeatedly produce a high-power output or sprint speed is key fitness component most field court sports. aim this study was evaluate the eight different approaches quantify parameter in tests performance. Ten physically active men completed two trials each running protocols with...

The purpose of the present study was to determine number familiarization sessions required obtain an accurate measure reliability associated with loaded vertical jump and 20-m sprint running performance. Ten physically active men attended 5 separate testing over a 3-week period where they performed unloaded (10-kg extra load) countermovement (CMJ) static (SJ) jumps, followed by straight-line sprints. Jump height recorded for jumps using mat, while time 10 m 20 during sprints photocells....

The aim of this study was to examine the effects caffeine supplementation on multiple sprint running performance.Using a randomized double-blind research design, 21 physically active men ingested gelatin capsule containing either (5 mg x kg(-1) body mass) or placebo (maltodextrin) 1 h before completing an indoor trial (12 30 m; repeated at 35-s intervals). Venous blood samples were drawn evaluate plasma and primary metabolite concentrations. Sprint times recorded via twin-beam photocells,...

Ischemic preconditioning enhances exercise performance. We tested the hypothesis that ischemic would improve intermittent in form of a repeated sprint test during cycling ergometry.In single-blind, crossover study, 14 recreationally active men (mean ± SD age, 22.9 3.7 yr; height, 1.80 0.07 m; and mass, 77.3 9.2 kg) performed twelve 6-s sprints after four 5-min periods bilateral limb occlusion at 220 mm Hg (ischemic preconditioning) or 20 (placebo).Ischemic resulted 2.4% 2.2%, 2.6% 2.7%, 3.7%...

Glaister, M, Pattison, JR, Muniz-Pumares, D, Patterson, SD, and Foley, P. Effects of dietary nitrate, caffeine, their combination on 20-km cycling time trial performance. J Strength Cond Res 29(1): 165–174, 2015—The aim this study was to examine the acute supplementation effects Using a randomized, counterbalanced, double-blind Latin-square design, 14 competitive female cyclists (age: 31 ± 7 years; height: 1.69 0.07 m; body mass: 61.6 6.0 kg) completed four trials racing bicycle fitted turbo...

The purpose of this study was to determine the number familiarization sessions required obtain an accurate measure reliability associated with force variables recorded during unloaded and loaded (30 60% 1 repetition maximum squat [1RM]) static vertical jumps (SJ). Nine physically active men attended 4 separate testing over a 2-week period. Force platform recordings peak force, rate development (pRFD), average development, takeoff velocity, power, power were obtained for each jump. During...

The aims of this study were to evaluate the time-course familiarization process associated with a test multiple sprint running performance and determine reliability various indices once had been established. Eleven physically active men (mean age: 21 +/- 2 years) completed 4 trials (12 x 30 m; repeated at 35-s intervals) 7 days between trials. All testing was conducted indoors, times recorded by twin-beam photocells. Results revealed no apparent learning effects as evidenced significant (p >...

Tests of repeated-sprint ability provide a simple way to evaluate the basic physical characteristics speed and endurance necessary excel in various multiple-sprint sports. Furthermore, such tests help overcome complications associated with field-based evaluations this type exercise. Nevertheless, despite over 40 y research, many issues regarding our understanding work remain unresolved. This commentary aims raise awareness relating methodology, physiological responses, effectiveness...

The purpose of this study was to examine the influence recovery duration on various measures multiple sprint cycling performance. Twenty-five physically active men completed 2 maximal (20 x 5 seconds) tests with contrasting periods (10 or 30 seconds). mean +/- SD values for age, height, and body mass were 20.6 1.5 years, 177.2 5.4 cm, 78.2 8.2 kg, respectively. All conducted a friction-braked cycle ergometer. Longer (30 resulted in significantly (p < 0.05) higher maximum (approximately 4%)...

The purpose of this study was to assess the effect periodized resistance training on accelerative sprint performance. Sixteen physically active men participated in a randomized controlled study. An experimental group (n = 10) completed an 8-week intervention, while control 6) did not train. Pre- and post-training measures 20-m straight-line time, including 10-m split, maximum strength, explosive were recorded. Flight stance stride length, frequency quantified from digitized video recordings...

Weightlifting shoes (WS) are often used by athletes to facilitate their squat technique; however, the nature of these benefits is not well understood. In this study, effects footwear and load on mechanics squatting were assessed for 32 participants (age: 25.4 ± 4.4 years; mass 72.87 11.35 kg) grouped sex experience. Participants completed loaded unloaded back squats wearing both WS athletic (AS). Data collected utilising a 3D motion capture system synchronised with force platform calculate...

The purpose of the present study was to determine number familiarization sessions required obtain an accurate measure reliability associated with loaded vertical jump and 20-m sprint running performance. Ten physically active men attended 5 separate testing over a 3-week period where they performed unloaded (10-kg extra load) countermovement (CMJ) static (SJ) jumps, followed by straight-line sprints. Jump height recorded for jumps using mat, while time 10 m 20 during sprints photocells....

Temporary muscle damage precipitated by downhill walking affects function and potentially exposes to further musculoskeletal injury.We hypothesized that the use of trekking poles would help maintain reduce indices after a day's mountain trekking.Thirty-seven physically active males (n = 26) females 11) volunteered participate were divided into either pole (TP) or no (NP) group. Participants carried day sack (5.6 ± 1.5 kg) made ascent descent highest peak in England Wales (Mount Snowdon). HR...

Abstract The aim of this study was to investigate the effects caffeine supplementation on peak anaerobic power output ( W max ). Using a counterbalanced, randomised, double‐blind, placebo‐controlled design, 14 well‐trained men completed three trials protocol consisting series 6‐s cycle ergometer sprints, separated by 5‐min passive recovery periods. Sprints were performed at progressively increasing torque factors determine power/torque relationship and . Apart from Trial 1 (familiarisation),...

The purpose of the present study was to assess reliability and validity fatigue measures, as derived from 4 separate formulae, during tests repeat sprint ability. On days over a 3-week period, 2 groups 7 recreationally active men completed 6 trials 1 maximal (20 x 5 seconds) intermittent cycling with contrasting recovery periods (10 or 30 seconds). All were conducted on friction-braked cycle ergometer, scores measures mean power output for each sprint. Apart formula 1, which calculated...

Wakefield, BR and Glaister, M. Influence of work-interval intensity duration on time spent at a high percentage O2max during intermittent supramaximal exercise. J Strength Cond Res 23(9): 2548-2554, 2009-The purpose this study was to examine the effect (WID) at, or above, 95% (T95 O2max) bouts Over 5-week period, 7 physically active men with mean (±SD) age, height, body mass, 22 ± 5 years, 181.5 5.6 cm, 86.4 11.4 kg, 51.5 1.5 ml·kg−1·min−1, respectively, attended testing sessions. After...