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Sprint Cycling Study A recent study compared the effects of six 30-second maximum sprint cycling sessions with 90 minutes of continuous moderate cycling on the blood of 19 young men. The study, published in Cell Reports Medicine, August 13, measured proteins in the plasma, the liquid part of the blood, before exercise, immediately after, and three hours later. The intense sprint cycling caused a rapid early shift in protein levels, while moderate cycling caused a smaller delayed shift. After exercise, muscles, fat tissue, liver, and immune cells change the composition of plasma, which then reaches other tissues and can alter their gene activity. The study tracked how the two cycling regimes changed the composition of plasma and its effects on fat cells. The researchers found that 714 out of 2,884 measured proteins changed immediately after sprint cycling, while seven proteins changed immediately after moderate cycling, and 19 changed three hours later. The study also showed that the plasma taken after sprint cycling altered the activity of 1,128 genes and decreased the activity of 549 genes in human fat cells grown in the lab. 🔗 Read original →