Document Type

Thesis

Publication Date

1994

Advisor

Marcus Webster

Abstract

Electromyographic and force analysis of Pectoralis major and Latissimus dorsi muscles during a reverse punch demonstrated a significant positive correlationbetween the average force of individuals and their rank (p<0.01; r-squared=0.73). Also demonstrated was a positive correlation between the amount of EMG activity in the muscles studied and the force (for Pectoral: r-squared=0.757, pc0.05; for Latissimus: r-squared= 0.733, p<0.1). The relationship between punch duration and rank yielded insignificant results (for Pectoral: r-squared= 0.222, p<0.240; for Latissimus: r-squared=0.461, p<0.065). Precontact EMG activity and rank regression analysis demonstrated a significant positive correlation for both muscles (for Latissimus: p<0.005, r-squared=0.752; for Pectoral: p<0.006, r-squared=0.735). Post contact EMG activity and rank regression analysis also demonstrated a significant positive correlation for both muscles (for Latissimus: p<0.0.04, r-squared=0.773; for Pectoral: p<0.005, r-squared=0.760). A negative correlation between precontact EMG activity and punch duration was shown for both muscles (for Pectoral: -0.568; for Latissimus: -0.626). A negative correlation was between punch duration and force was shown for both muscles (for Pectoral: -0.559; for Latissimus: -0.715). A positive correlation between force and precontact EMG activity was demonstrated (for Pectoral: 0.757; for Latissimus: 0.733).

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