The Impact of Velocity of Movement on Performance Factors in Resistance Exercise

• Autores: Disa L. Hatfield, William J. Kraemer, Barry A. Spiering, Keijo Häkkinen, Jeff S. Volek
• Localización: Journal of strength and conditioning research: the research journal of the NSCA, ISSN 1064-8011, Vol. 20, Nº. 4, 2006, págs. 760-766
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Dialnet Métricas: 6 Citas
• Resumen

  • Hatfield, D.L., W.J. Kraemer, B.A. Spiering, K. Häkkinen, J.S. Volek, T. Shimano, L.P.B. Spreuwenberg, R. Silvestre, J.L. Vingren, M.S. Fragala, A.L. Gómez, S.J. Fleck, R.U. Newton, and C.M. Maresh. The impact of velocity of movement on performance factors in resistance exercise. J. Strength Cond. Res. 20(4):760-766. 2006.-The purpose of this study was to determine the impact of a very slow (VS) velocity and a self-selected volitional (VOL) velocity at varying intensities on repetition number, peak force, peak power, and total volume in the squat and shoulder press exercises. On separate testing days, 9 resistance trained men (age: 23.9 ± 2.5 years; height: 174.8 ± 6.5 cm; body mass: 80.1 ± 12.4 kg) performed a squat (SQ) and shoulder press (SP) exercise at 60 or 80% of 1 repetition maximum (1RM) at either VOL or VS (10-second eccentric and 10-second concentric actions) velocity for as many repetitions as possible. Force, power, and volume (repetitions × kg) were also determined. Subjects performed significantly fewer repetitions (p 0.05) in the VS exercises (60% VS SQ 5 ± 1 vs. VOL SQ 24 ± 2; 80% VS SQ 2 ± 0 vs. VOL SQ 12 ± 1; 60% VS SP 4 ± 1 vs. VOL SP 14 ± 2; 80% VS SP 1 ± 0 vs. VOL SP 6 ± 1). Peak force and power were significantly higher at the VOL speed (peak force [in newtons]: 60% VS SQ 564.4 ± 77.3 vs. VOL SQ 1229.0 ± 134.9 N; 80% VS SQ 457.3 ± 27.9 vs. VOL SQ 1059.3 ± 104.7 N; 60% VS SP 321.6 ± 37.8 vs. VOL SP 940.7 ± 144.8 N; 80% VS SP 296.5 ± 24.7 vs. VOL SP 702.5 ± 57.7 N; and peak power [in watts]: 60% VS SQ 271.2 ± 40.1 vs. VOL SQ 783.2 ± 129.1 W; 80% VS SQ 229.3 ± 49.5 vs. VOL SQ 520.2 ± 85.8 W; 60% VS SP 91.3 ± 21.9 vs. VOL SP 706.6 ± 151.4 W; 80% VS SP 78.1 ± 19.8 vs. VOL SP 277.6 ± 46.4 W). VOL speed elicited higher total volume than the VS velocity. The results of this study indicate that a VS velocity may not elicit appropriate levels of force, power, or volume to optimize strength and athletic performance.