US-Australian study finds 30-second sprints alter 714 proteins vs 7 after 90-minute ride
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A study in Cell Reports Medicine found that six 30-second all-out cycling sprints altered 714 plasma proteins in 19 healthy men, compared with seven proteins after 90 minutes of moderate cycling. The sprint-induced protein changes included growth hormone and tissue-repair factors but largely faded within three hours. Moderate exercise more strongly affected small-molecule metabolism, including fatty acids.
Key Facts
- The study, published in Cell Reports Medicine, involved 19 healthy male volunteers.
- Six 30-second all-out cycling sprints altered 714 of 2,884 plasma proteins studied, while 90 minutes of moderate cycling altered only seven.
- Three hours after the sprint session, the number of altered proteins had fallen nearly twentyfold.
- Plasma from sprinters influenced 1,677 genes in fat cells, compared with 25 genes influenced by plasma after the 90-minute ride.
- Moderate exercise had a stronger effect on the metabolism of small molecules, including fatty acids, the researchers concluded.
Study Design
Researchers from the United States and Australia recruited 19 healthy male volunteers for the experiment. Participants were divided into two groups: one performed six 30-second all-out cycling sprints, and the other cycled at a moderate pace for 90 minutes. Blood samples were collected before exercise, immediately after, and three hours later. The results were published in the journal Cell Reports Medicine.
Biochemical Response
The sprint session triggered changes in 714 of 2,884 plasma proteins examined, while the moderate ride altered only seven. After the sprints, researchers recorded a surge in growth hormone, vascular formation factors, and elements responsible for tissue regeneration. The number of altered proteins dropped nearly twentyfold within three hours after the sprint session. Even after an eight-week training cycle, the biochemical response remained the same, indicating the effect stems from the nature of the load rather than initial stress on an untrained body.
Gene Expression and Fat Cells
Plasma from the sprint group influenced the behavior of 1,677 genes in fat cells, while plasma from the 90-minute ride influenced only 25. Later, shifts in the activity of about 2,600 genes were recorded in the fat tissue of the sprint group. The researchers noted that moderate exercise had a stronger effect on the metabolism of small molecules, including fatty acids, highlighting the role of such processes during recovery.
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US-Australian study finds 30-second sprints alter 714 proteins vs 7 after 90-minute ride
