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The effects of HIT exercise on cleaved PARP-1 protein content measured pre-exercise (Pre), immediately post-exercise (Post) and three days post-exercise in young trained (YT), young untrained (YU), old trained (OT) and old untrained (OU) participants. There was a trend for a group by time interaction (P = 0.072) with total PARP-1 increasing following the exercise in both young groups with no change in both old groups.
