Push-up 운동 시 손목과 주관절 방향에 따른 근활성도 분석

Abstract

This study is designed to analyze upper body muscle activation while performing three types of Push-ups (1. Hand front without 45° horizontal abduction: HFWOHA; 2. Hand front with 45° horizontal abduction: HFWHA; 3. Hand toward side with 45° horizontal abduction: HSWHA). Participants were recruited by convenience sampling method and total eighteen people without orthopedical disease participated in this study. Each subject practiced three types of push-ups by guideline before the measurement and performed the push-ups. Muscle activation was measured by a surface electromyography (EMG). The average amplitudes of the electromyographic of the pectoralis major, anterior deltoid and triceps brachii were recorded and normalized to root mean square. A repeated measures analysis of variance with bonferroni post hoc test was used to analyze date. Push-ups under HFWHA and HSWHA provided greater muscle activity than HFWOHA for Pectoralis Major. Therefore, push-ups performing elbow abduction were more effective to increase the activation of pectoralis major muscle. We suggest that push-up with HSWHA is a beneficial training method to facilitate pectoralis major reducing upward rotation of scapular during Push-ups.