Comparison of the Effects of Eccentric, Concentric, and Eccentric-Concentric Isotonic Resistance Training at Two Velocities on Strength and Muscle Hypertrophy

Ünlü, G, Çevikol, C, and Melekoğlu, T. Comparison of the effects of eccentric, concentric, and eccentric-concentric isotonic resistance training at two velocities on strength and muscle hypertrophy. J Strength Cond Res 34(2): 337–344, 2020—The aim of this study was to compare the effects of concentric, eccentric, and eccentric-concentric isotonic resistance training at both fast and slow velocities to determine whether contraction modality affects muscle strength and hypertrophy. Forty-one young, healthy males (mean age 21.1 ± 1.8 years; height 178.9 ± 6.1 cm; body mass 70.5 ± 9.8 kg; and body mass index 22.0 ± 2.6 kg·m−2) were randomly assigned for 12 weeks to 1 of 5 resistance training groups to perform leg extension exercises 3 days a week (fast-eccentric; fast-concentric [FC]; slow-eccentric [SE]; slow-concentric; and concentric-eccentric [CE], 30°·s−1 for slow and 180°·s−1 for fast contractions), or to a nontraining control group (CG). Isotonic strength (1 repetition maximum [1RM]), isokinetic strength (peak torque), and quadriceps femoris muscle volume were measured before and after the 12 weeks of training program. In the early phase of the training period (first 3 weeks), the 1RM values of SE, FC, and CE increased remarkably (19.70, 13.73, and 19.35%, respectively; p
Source: Journal of Strength and Conditioning Research - Category: Sports Medicine Tags: Original Research Source Type: research

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