In-Cheol Jeon

Comparison of pectoralis major and serratus anterior activity during scapular protraction with and without reciprocal inhibition in healthy individuals

Background Sufficient scapular stability is essential for optimal upper-extremity function, with the serratus anterior (SA) playing a key role in both open and closed-chain exercises. However, compensatory pectoralis major (PM) overactivation often interferes with selective SA ac...

Activation of the gluteus maximus and multifidus muscles in bridge and hip thrust exercise variations

Background The gluteus maximus (GM) and multifidus (MF) play important roles in maintaining the stability and mobility of the lumbopelvic-hip complex during various activities. Variations in bridge and hip thrust exercises can affect muscle activity in the GM, MF, and biceps femo...