This study hypothesized that sustained sympathoexcitation via MMA slows down PHRR and that GSE supplementation is effective at improving PHRR in young individuals. 12 Participants were randomly assigned, via a double-blind, cross-over design, to either receive GSE (300mg, 2 capsules) or PL (300mg, 2 capsules), with a washout period of at least 72 hrs. between trials. A submaximal exercise test was performed using a cycle ergometer combined with isometric handgrip exercise using a handgrip dynamometer, and blood flow occlusion by placing a cuff over the brachial artery of the dominant arm. Post heart rate recovery (PHRR) was measured at 5 sec. intervals throughout the experiment. The PHRR was evaluated between GSE and PL at every min. for 300 sec.
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Heart rate recovery every minute and heart rate kinetics (tau) following exercise
Timeframe: 5 min after exercise