Author : Kelli J. Stoelting
Publisher :
ISBN 13 :
Total Pages : 78 pages
Book Rating : 4.:/5 (263 download)
Book Synopsis The Effects of Hand Placement on Muscle Activation During a Closed Kinetic Chain Exercise in Physically Active Females by : Kelli J. Stoelting
Download or read book The Effects of Hand Placement on Muscle Activation During a Closed Kinetic Chain Exercise in Physically Active Females written by Kelli J. Stoelting and published by . This book was released on 2008 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rehabilitation of the shoulder can be a complex process with an approach that is constantly changing. In order to be successful in the rehabilitation process, a complete understanding of the cause of injury and an accurate diagnosis is required2. Researchers are constantly testing new ideas and working to improve the current protocols. Knowing and understanding the movements of the shoulder complex and being aware of the muscles involved in this movement is vital to producing a solid rehabilitation protocol. Finding exercises that patients can perform on their own can be beneficial as well, especially when working with busy athletes or patients that may not have regular access to the clinician. One specific exercise, the push-up plus, is a great scapular stabilizing exercise that has been used clinically. Various hand placements during the push-up plus, however have not been thoroughly researched. The purpose of this study was to compare three different hand placements (normal, narrow, and wide) in a push-up plus to determine the average EMG activity in each using healthy female subjects. The female subjects' results will be compared to a previous study which looked at the EMG activity in male subjects only for future investigations. A better understanding of the muscle activation involved in this exercise will allow clinicians to apply the correct techniques to the corresponding population they are working with. Twenty female subjects were recruited from a university setting and were tested performing the push-up plus in different hand positions (normal, narrow, and wide) while electromyography (EMG) of the serratus anterior (SA), middle (MT) and lower trapezius (LT) was assessed. Five trials for each hand placement were performed in a randomized order. The exercises were divided into three phases: 1) push-up phase, 2) plus phase 3) push-up plus phase. Each EMG signal collected during the push-up plus was normalized using the MVC average EMG signals. This allowed the trials to be expressed in percentages of each subject's MVC trials. The data for each muscle was processed in SPSS v14.0 (SPSS Inc. Chicago, IL) for Windows statistical program. The independent variables were hand placement (Normal, Narrow, and Wide) and Exercise (Push-Up, Plus, and Push-Up Plus). The dependant variables were the average peak EMG activation of the three muscles (middle trapezius, lower trapezius, and serratus anterior). For each dependent variable, a separate two-within factor (Exercise and Hand Placement) repeated measures analysis of variance was performed. Significance was set a priori at p
