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J Strength Cond Res. 2019 Jul;33(7):1871-1877. doi: 10.1519/JSC.0000000000002808.

Relationship Between Body Mass, Peak Power, and Power-to-Body Mass Ratio on Sprint Velocity and Momentum in High-School Football Players.

Author information

1
Department of Kinesiology, California State University, Northridge, California.
2
Athletics Department, Granada Hills Charter High School, Granada Hills, California.
3
School of Medical and Health Sciences, Edith Cowan University, Perth, Australia.
4
Sport Performance Research Institute New Zealand, AUT University, Auckland, New Zealand.
5
Footballscience.net, Rödermark, Germany.
6
Department of Kinesiology, Center for Sport Performance, California State University, Fullerton, Fullerton.

Abstract

Jalilvand, F, Banoocy, NK, Rumpf, MC, and Lockie, RG. Relationship between body mass, peak power, and power-to-body mass ratio on sprint velocity and momentum in high-school football players. J Strength Cond Res 33(7): 1871-1877, 2019-The ability to rapidly shift one's body mass horizontally or vertically is common within American football irrespective of field position, and the capacity to generate power is a favorable physical quality. This requires analysis in high-school football players, especially considering the body mass disparities that exist in this population. Sixteen high-school players (7 backs and 9 linemen) completed the vertical jump (VJ) to determine jump height, peak anaerobic power measured in watts (PAPw), and power-to-body mass ratio (P:BM), and a 36.58-m sprint (0-4.57, 0-9.14, and 0-36.58-m intervals) to determine sprint velocity and momentum. Independent-samples t-tests (p < 0.05) determined differences in these variables between the backs and linemen. Pearson's correlations (r; p < 0.05) computed relationships between body mass, VJ height, PAPw, P:BM, with 36.58-m sprint velocity and momentum on the pooled data. Linemen were heavier, and slower in the 36.58-m sprint, but had greater PAPw and sprint momentum compared with backs. Body mass exhibited negative relationships to velocity across all sprint intervals (r = -0.55 to 0.70), and positive relationships with momentum across all intervals (r = 0.95-0.96). The VJ correlated with sprint velocity across all intervals (r = 0.51-0.83), but not momentum. PAPw was positively correlated with body mass and momentum across all intervals (r = 0.77-0.85), but not velocity. There were significant correlations between P:BM with velocity (r = 0.51-0.85) and momentum (r = -0.53-0.62) across all intervals. Heavier high-school players could focus on improving P:BM to positively influence jumping ability and sprint velocity.

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