The Effect of Rest Intervals between Sets of Resistance Exercise on Plasma Antioxidant Capacity Changes and Cell Injury Index

The aim of this study was to determine the effect of rest intervals between two resistance exercise protocols (with similar volume and intensity) on plasma antioxidant capacity (TAC) and creatine kinase (CK). For this purpose, 20 untrained subjects voluntarily participated in the research and randomly assigned to one of the two resistance exercise groups with 2-minute rest interval and 4-minute rest interval. Resistance exercise was performed in four sets of six repetitions maximum (6RM). Blood samples were collected before the exercise, immediately after the exercise, 6, 24 and 48 hours after the exercise. The results indicated that both resistance exercises with different rest intervals significantly changed plasma antioxidant capacity and creatine kinase (P≤0.05). However, there was no significant difference in the TAC and CK between the groups during the study (P>0.05). Generally, it can be said that rest intervals between resistance exercises cannot have an effect on redox changes and cellular damage, but the intensity of exercise was more important.