Neural and muscular alterations in healthy and obese during intermittent static exertions Conference Paper uri icon

abstract

  • The aim of this study was to explore obesity-related neural and muscular changes during intermittent upper extremity exertions. A total of fifteen participants (8 healthy and 7 obese) performed intermittent elbow and grip exertions (30 s cycle time, 50% duty cycle) for 4 minutes at 30% of maximum voluntary contraction (MVC). Cerebral oxygenation, force fluctuations, and perceived exertion were recorded throughout the task duration. Results indicated that force fluctuation was significantly higher in the obese group compared to the healthy group when performing handgrip exertions. On the other hand, the healthy group showed greater fluctuations when performing elbow exertions compared to the obese group. Additionally, the obese group displayed significantly lower oxygenated hemoglobin during handgrip compared to the elbow flexion exertions. These findings indicate that obesity influenced neural and muscular responses, and that this relationship is muscle-dependent. Understanding altered neural and muscular responses in the obese may provide mechanistic insights on the functional capabilities and limitations of obese workers.

author list (cited authors)

  • Shortz, A. E., & Mehta, R. K.

publication date

  • January 2013