Comparações entre durações médias da repetição em exercícios na musculação

Abstract

The influence of structural variables on strength training has been largely studied by authors who have as a goal an improvement in this practice, including the variable duration of repetition. It has been considered that it is little prescribed in quantitative way (i.e 4s, 6s) by professionals. Therefore, it has been necessary to check the real durations on the practice when the auto-selected durations and discuss their implying to strength training. The target of this study was to compare the mean duration of repetition in different exercises. There have been registered with manual chronometer 480 sets of 16 exercises (Back Squat on Smith Machine, Back Squat on Smith Machine, Leg Press 45°, Leg Extension, Leg Curl, Bench Press, Vertical Bench Press on Machine, Dumbbell Flat Bench Press, Dumbbell Fly, Fly, Lat Pull Down, Machine Bent-Over Rows, Elbow Curl, Dumbbell Concentration Curl, Triceps Pull Down, Lying Triceps Extension), it has been doing 30 sets per exercises. The data in this study showed that the mean duration of repetition stayed in an interval between 2 and 3 s. Significant differences were found in comparison of mean durations of repetition between exercises on machines and exercises with free weights (except on significant differences found in comparison between mean duration of repetition Leg Extension and Lat Pull Down, both performed on machines, and between exercises Back Squat on Smith Machine and Dumbbell Concentration Curl without significant differences). However, these differences may not be important on physiological and biomechanical aspects, so, in work load. The prescription more controlled this variable could result in different workout training, consequently in acute and chronic adaptations distinct.