Bench Press Load-Velocity Profiles and Strength After Overload and Taper Microcyles in Male Powerlifters

• Autores: Tyler D. Williams, Mike R. Esco, Michael V. Fedewa, Phillip A. Bishop
• Localización: Journal of strength and conditioning research: the research journal of the NSCA, ISSN 1064-8011, Vol. 34, Nº. 12, 2020, págs. 3338-3345
• Idioma: inglés
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• Resumen

  • The purpose of this study was to quantify the effect of an overload microcycle and taper on bench press velocity and to determine if the load-velocity relationship could accurately predict 1-repetition maximum (1RM). Twelve male powerlifters participated in resistance training structured into an introduction microcycle, overload microcycle (PostOL), and taper (PostTP). At the end of each microcycle, subjects completed a bench press for 1RM assessment consisting of warm-up sets at 40, 55, 70, and 85% of a previously established 1RM. The mean concentric velocity (MCV) was recorded during each warm-up set. A predicted 1RM (p1RM) was calculated using an individualized load-velocity profile (LVP). The average MCV decreased after PostOL (0.66 +/- 0.07 m[middle dot]s-1) compared with baseline (BL) (p = 0.003; 0.60 +/- 0.11 m[middle dot]s-1) but increased after PostTP (0.67 +/- 0.09 m[middle dot]s-1). One-repetition maximum increased from PostOL (146.7 +/- 19.8 kg) to PostTP (p = 0.002; 156.1 +/- 21.0 kg), with no differences observed between other test sessions (p > 0.05). Bland-Altman analysis indicated that p1RM was consistently higher than measured 1RM (3.4-7.8 kg), and the limits of agreement were extremely wide. However, very large to near perfect correlations (r = 0.89 to 0.96) were observed between p1RM and 1RM during BL, PostOL, and PostTP. The load-velocity relationship established from submaximal sets did not accurately predict 1RM, but MCV was affected by changes in weekly training loads. Velocity-based measurements seem to be more sensitive to changes in training loads than maximal strength.