Abstract
The effect of muscle stress caused by isotonic exercise and isometric exercise on oxidative stress was examined. A hand-grip exercise was carried out with the right hand, using a hand-dynamometer. Thirty-one healthy volunteers with no past history of medication were recruited for this study. A free radical analytical system was used to measure oxidative stress (hydroperoxide consistency), and blood specimens were collected from a finger tip under two conditions: 1) at rest, and 2) immediately after completion of the test. No significant difference was seen in oxidative stress under these two conditions. However, blood pressure and heart rate showed significant increases for both isotonic exercise and isometric exercise, compared with the rest period (both p<.001). This indicates that there was no change in oxidative stress even with an increase in blood pressure and heart rate for both isotonic exercise and isometric exercise.
