The Influence of Ratio and Allometric Scaling Procedures for Normalizing Upper Body Power Output in Division I Collegiate Football Players

• Autores: Brennan J. Thompson, Doug B. Smith, Bert H. Jacobson, Ryan E. Fiddler, Aric J. Warren, Blaine C. Long, Matthew S. O'Brien, K. Lee Everett, Rob G. Glass, Eric D. Ryan
• Localización: Journal of strength and conditioning research: the research journal of the NSCA, ISSN 1064-8011, Vol. 24, Nº. 9, 2010, págs. 2269-2273
• Idioma: inglés
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• Resumen

  • The purpose of the present study was to examine the differences in upper body power output among lineman and nonlineman division I collegiate football players and to examine the influence of 2 normalization procedures: (a) simple ratio scaling and (b) standardized allometric scaling. Ten lineman (mean ± SD: age = 19.3 ± 1.6 years; height = 187.7 ± 4.7 cm; mass = 127.7 ± 13.3 kg) and 14 nonlineman (19.6 ± 1.4 years; 181.8 ± 5.2 cm; 92.3 ± 10.6 kg) performed a multiple repetition bench press power test at 50% of their 1 repetition maximum. Peak power (PP) was determined from a Tendo weightlifting analyzer that was attached to the barbell. The PP values were then analyzed under 3 conditions that included: (a) no scaling (absolute values), (b) ratio scaling (PP body mass-1), and (c) allometric scaling (PP body mass-0.67). The results indicated that the larger lineman demonstrated greater absolute PP values (p = 0.02); however, ratio scaling favored the smaller nonlineman group (p = 0.04). There were no differences in PP values between positions after the standardized allometric scaling procedure (p = 0.60). These findings indicated that the standardized allometric scaling procedure may be a more effective method for normalizing PP values among elite division I collegiate football players.

    The purpose of the present study was to examine the differences in upper body power output among lineman and nonlineman division I collegiate football players and to examine the influence of 2 normalization procedures: (a) simple ratio scaling and (b) standardized allometric scaling. Ten lineman (mean ± SD: age = 19.3 ± 1.6 years; height = 187.7 ± 4.7 cm; mass = 127.7 ± 13.3 kg) and 14 nonlineman (19.6 ± 1.4 years; 181.8 ± 5.2 cm; 92.3 ± 10.6 kg) performed a multiple repetition bench press power test at 50% of their 1 repetition maximum. Peak power (PP) was determined from a Tendo weightlifting analyzer that was attached to the barbell. The PP values were then analyzed under 3 conditions that included: (a) no scaling (absolute values), (b) ratio scaling (PP body mass-1), and (c) allometric scaling (PP body mass-0.67). The results indicated that the larger lineman demonstrated greater absolute PP values (p = 0.02); however, ratio scaling favored the smaller nonlineman group (p = 0.04). There were no differences in PP values between positions after the standardized allometric scaling procedure (p = 0.60). These findings indicated that the standardized allometric scaling procedure may be a more effective method for normalizing PP values among elite division I collegiate football players.