Examining Unilateral and Bilateral Exercises through the Load-velocity Relationship

Author:

Martínez-Rubio Carlos12,Baena-Raya Andrés12,Díez-Fernández David M.12,Rodríguez-Pérez Manuel Antonio12,Pareja-Blanco Fernando3

Affiliation:

1. Department of Education, Faculty of Education Sciences, University of Almeria, Almería, Spain

2. CERNEP Research Center, SPORT Research Group (CTS1024), Almería, Spain

3. Department of Sports and Computers Sciences, Pablo de Olavide University, Sevilla, Spain

Abstract

AbstractThis study aimed to examine the load-velocity (L-V) relationship in the bench-press (BP) and leg-press (LP) exercises performed unilaterally, and compared this unilateral L-V relationship with the bilateral variants. Nineteen men (age=23.5±2.1 years) completed two incremental tests in BP and LP, performed bilaterally and unilaterally, across two sessions with a 48-hour rest period. We found a close relationship between medium propulsive velocity (MPV) and %1RM in unilateral BP (R2  =0.97, SEE=0.06 m·s-1) and LP (R2=0.96, SEE=0.06 m·s-1). No significant differences were observed between the preferred and non-preferred sides in the L-V relationship for either exercise. Additionally, higher velocities were achieved in unilateral exercises compared to bilateral exercises, particularly with light and moderate loads (30–70%1RM) in BP (p<0.05) and with light loads (30–45%1RM) in LP (p<0.05). Close L-V relationships were observed in unilateral exercises, without differences in the L-V relationships between preferred and non-preferred sides despite the interlimb asymmetries in the absolute strength values. Interestingly, lower velocities were observed at light loads (~30–45% 1RM) for bilateral compared to unilateral exercises, which could be explained by different strength deficits for these exercises.

Publisher

Georg Thieme Verlag KG

Subject

Orthopedics and Sports Medicine,Physical Therapy, Sports Therapy and Rehabilitation

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