Mean Velocity vs. Mean Propulsive Velocity vs. Peak Velocity: Which Variable Determines Bench Press Relative Load With Higher Reliability?

• Autores: Amador García Ramos, Francisco L. Pestaña Melero, Alejandro Pérez Castilla, Francisco J. Rojas, G. Gregory Haff
• Localización: Journal of strength and conditioning research: the research journal of the NSCA, ISSN 1064-8011, Vol. 32, Nº. 5, 2018, págs. 1273-1279
• Idioma: inglés
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• Dialnet Métricas: 3 Citas
• Resumen

  • This study aimed to compare between 3 velocity variables (mean velocity [MV], mean propulsive velocity [MPV], and peak velocity [PV]): (a) the linearity of the load-velocity relationship, (b) the accuracy of general regression equations to predict relative load (%1RM), and (c) the between-session reliability of the velocity attained at each percentage of the 1-repetition maximum (%1RM). The full load-velocity relationship of 30 men was evaluated by means of linear regression models in the concentric-only and eccentric-concentric bench press throw (BPT) variants performed with a Smith machine. The 2 sessions of each BPT variant were performed within the same week separated by 48–72 hours. The main findings were as follows: (a) the MV showed the strongest linearity of the load-velocity relationship (median r2 = 0.989 for concentric-only BPT and 0.993 for eccentric-concentric BPT), followed by MPV (median r2 = 0.983 for concentric-only BPT and 0.980 for eccentric-concentric BPT), and finally PV (median r2 = 0.974 for concentric-only BPT and 0.969 for eccentric-concentric BPT); (b) the accuracy of the general regression equations to predict relative load (%1RM) from movement velocity was higher for MV (SEE = 3.80–4.76%1RM) than for MPV (SEE = 4.91–5.56%1RM) and PV (SEE = 5.36–5.77%1RM); and (c) the PV showed the lowest within-subjects coefficient of variation (3.50%–3.87%), followed by MV (4.05%–4.93%), and finally MPV (5.11%–6.03%). Taken together, these results suggest that the MV could be the most appropriate variable for monitoring the relative load (%1RM) in the BPT exercise performed in a Smith machine.