Abstract
PURPOSE: The purpose of this study was to examine the acute effects of CrossFit on blood redox changes. METHODS: 10 males 26.4 yrs (+/− 2.7yrs) with at least three months of CrossFit experience completed “Cindy” (20min of as many pull-ups, push-ups, and squats as possible) and a 20 min 90% HRmax Treadmill bout as determined by graded exercise test on separate occasions. Blood plasma was collected at 4 different time points for each trial: pre, post, 1hr post and 2hr post, to examine lipidperoxidation (LOOH) and antioxidant capacity. RESULTS: Cindy and Treadmill elicited a time dependent increase of LOOH in 1hr post (143% and 115%) and 2hr post (256% and 167%) respectively. Ferric Reducing Antioxidant Power (FRAP) also demonstrated a time dependent increase within Cindy and Treadmill bouts; post (25%, 17%), 1hr post (26%, 4.8%), 2hr (20%, 12%) respectively. Total Enzymatic Antioxidant Capacity (TEAC) showed a time dependent decrease in post (−10%, −12%), 1hr post (−12%, −6%), 2hr post (−7%, −11%) respectively. Following Cindy, trial dependent differences existed at 1hr for FRAP (+16% over Tread) and TEAC (−11% than Tread). CONCLUSIONS: CrossFit elicited an acute blood oxidative stress response that is comparable to a bout of high intensity treadmill running; however, antioxidant response to Cindy were different during recovery.
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