Effects of Volume Training on Strength and Endurance of Back Muscles: A Randomized Controlled Trial

Context: Strength/resistance training volume has historically been supported in the American College of Sports Medicine recommendations. However, for the back muscles, exercise prescription related to the number of sets, such as single versus multiple, is not well established in the literature. Objective: The purpose of this study was to compare the effects of 2 training volumes on strength and endurance of back-extensor muscles in untrained young participants with regard to a repeated-measures design. Design: Randomized controlled trial. Setting: Laboratory of functional evaluation and human motor performance. Participants: Forty-four untrained young participants (mean age = 21 y) were randomized into single-set (n = 14), multiple-set (MSG, n = 15), and untrained control (n = 15) groups. Intervention: The single-set group and MSG underwent a 10-week progressive resistance training program (2 d/wk) using a 45° Roman chair. Main Outcome Measures: Back maximal strength (dynamometer) and isometric and dynami...