Effects of Whole-Body Electromyostimulation on strength and batting velocity of female collegiate softball players

Abstract

Batting velocity is an important component for successful hitting. Previous research has shown that batting velocity is influenced by increased muscular strength. Resistance training is broadly applied by strength and conditioning coaches to increase strength. However, recently, Whole-Body Electromyostimulation (WB-EMS) has been proven to be able to increase muscular strength in high performance athletes. This study aimed to examine the effects of eight weeks of dynamic WB-EMS training on muscular strength and batting velocity among female collegiate softball players. Forty softball players were randomly assigned to two groups: DS-EMS (n = 20) and DS (n = 20). Both groups performed 100 basic dry swings per session using a standard bat. Additionally, DS-EMS group performed whole body electromyostimulation after the dry swing training. The training program was conducted three times a week and all participants were tested before (baseline) and after (week-8) the training programs. Both groups showed statistically significant increases in predicted 1RM torso rotational strength (p ≤ 0.01) and batting velocity (p ≤ 0.01) after 8 weeks of training. The WB-EMS group showed significant increase in predicted 1RM bench press, and predicted 1RM squat (p ≤ 0.01). The WB-EMS group showed greater increases (p ≤ 0.01) in batting velocity compared to control group. These data indicate that an 8-week of dry swing training supplemented by dynamic WB-EMS sessions may significantly increase strength and batting velocity among female collegiate softball players.