This study investigated the acute physiological effects of isometric exercise at two different intensities and contraction times and their relation to post-exercise hypotension (PEH). Twelve college-aged participants (aged 24 ± 3.8 years) were enrolled in this study. Maximum voluntary contraction (MVC) during knee extension of their dominant leg was conducted in order to determine their 30%MVC and 70%MVC. Once the %MVC was determined, each participant then ask to return for two intervention sessions during which four sets of isometric knee extension were performed per condition in a crossover design. Isometric contraction time was two minutes for the 30%MVC condition and one minute for the 70%MVC condition. A two way repeated measures ANOVA was used to compare the effects of exercise condition and time on blood pressure and hemodynamic measures. No instance of PEH was observed in either condition. Deoxyhemoglobin (Hb) decreased (p = 0.002) and oxygen saturation (SO2) increased (p = 0.002) following exercise with no difference between conditions. Based on the results, exercise intensity may not play a large role in the PEH response.
|Commitee:||Alencar, Michelle, Schick, Evan|
|School:||California State University, Long Beach|
|School Location:||United States -- California|
|Source:||MAI 58/01M(E), Masters Abstracts International|
|Subjects:||Health sciences, Kinesiology, Physiology|
|Keywords:||Blood pressure, Hemodynamic response, Hypertension, Isometric, Post-exercise hypotension|
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