Sex differences in muscle force signal complexity and variability during maximal and submaximal exercise

Rule, Brady

Sex differences in muscle force signal complexity and variability during maximal and submaximal exercise

dc.contributor.advisor	Larson, Rebecca
dc.contributor.author	Rule, Brady
dc.contributor.committeeMember	Black, Christopher
dc.contributor.committeeMember	Larson, Daniel
dc.date.accessioned	2023-05-15T19:40:47Z
dc.date.available	2023-05-15T19:40:47Z
dc.date.issued	2023-05-12
dc.date.manuscript	2023-05-05
dc.description.abstract	Sex differences have been a topic of interest in exercise physiology as of late, especially the possibility of a sex-dependent fatigue mechanism. Signal complexity has the potential to provide a better picture of fatigue by examining the behavior of a signal produced throughout a fatiguing task. Complexity measures the self-similarity and regularity of a signal and is associated with a system’s ability to respond to a change in condition. PURPOSE: To determine if there are sex differences in variability and complexity of a force signal before and/or after maximal and or/submaximal exercise. METHODS: 16 healthy untrained individuals (9 females, 7 males) completed a maximal and submaximal isometric resistance exercise test using a handmade dynamometer. The maximal exercise test consisted of a 5-minute all-out test with 30 maximal effort isometric knee extensions at a 60% duty cycle (6s contraction, 4s rest). The submaximal exercise consisted of a submaximal test performed at 50% of their maximal voluntary contraction until task failure at a 60% duty cycle. Complexity and variability measures were calculated from the first and last three contractions. Performance measures included pre and post MVC, blood lactate, rating of perceived exertion (RPE), Time-to-Exhaustion (TTE), and force decrement. RESULTS: There were significant sex differences found in complexity and performance measures. Males experienced greater fatigue and levels of complexity after maximal and submaximal exercise. CONCLUSION: Further research is needed to determine the significance and applicability of complexity measures in exercise physiology. However, it appears low complexity in females is associated with increased fatigue resistance in a healthy untrained population after maximal and submaximal isometric resistant exercise.	en_US
dc.identifier.uri	https://shareok.org/handle/11244/337692
dc.language	en	en_US
dc.rights	Attribution-NoDerivatives 4.0 International	*
dc.rights.uri	http://creativecommons.org/licenses/by-nd/4.0/	*
dc.subject	Sex Differences	en_US
dc.subject	Complexity	en_US
dc.subject	Fatigue	en_US
dc.subject	Exercise	en_US
dc.thesis.degree	Master of Science	en_US
dc.title	Sex differences in muscle force signal complexity and variability during maximal and submaximal exercise	en_US
ou.group	Dodge Family College of Arts and Sciences::Department of Health and Exercise Science	en_US
shareok.orcid	0009-0002-7995-1900	en_US