Effect of the Upright posture trainer on muscular endurance and fatigue
Cathey, Ahalee Claire
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Postural control is a multidimensional subject that has global interest. The purpose of our research was to examine the effects of the 6-week upright training program on muscular endurance and fatigue. The significance of this study was to determine whether the upright posture trainer improves muscular endurance and decreases fatigue in the erector spinae muscles. Fifty-five college age students age 18-35 were randomized into a control or experimental group. The study protocol included 3 testing sessions: familiarization, pre-testing, and post-testing. The experimental group participated in a 21 session training program ranging from 5 min to 60 min in length, 4-5 days per week. The control group participated in all testing sessions but not the training program. Participants completed the modified Sorensen test with force measurements during all testing sessions. Instrumentation included the wireless bionomadix EMG system by Biopac and the microFET2 wireless digital dynamometer for measuring force output. The dependent variables in this study were muscular endurance and fatigue. Muscular endurance was determined based on the time to reach 20% of the participant’s maximum force, as indicated by the microFET2, during the Sorensen test. Muscular fatigue was analyzed using the median frequency and amplitude from the EMG recording using AcqKnowledge software and the peak force percent change during the Sorensen test. Neither hypothesis was supported. Further research should be done in clinical populations.