Çabuk, Refik, Kayacan, Yildrim, Murias, Juan Manuel and Karsten, Bettina ORCID: https://orcid.org/0000-0001-7336-9472 (2025) Physiologic and mechanical responses to clustered vs. traditional sprint interval exercise approaches. European Journal of Applied Physiology. ISSN 1439-6319 (Print), 1439-6327 (Online) (doi:10.1007/s00421-025-05857-4)

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Abstract

Purpose
This study compared responses to a traditional 30-s all-out sprint interval exercise (SIE) session, compared to two SIE sessions divided into clusters, with the aim to assess which of these sessions would result in higher peak oxygen uptake (O2peak), longer time at O2 ≥ respiratory compensation point (RCP), and greater peak power output during SIE (PPOSIE).

Methods
Twelve trained males (19 ± 1 years; 176 ± 5 cm; 65.9 ± 6 kg; O2max: 54.0 ± 6.2 mL kg−1 min−1) performed three work-matched all-out cycling SIE sessions with a load of 7.5% body mass: (1) SIE30: 4 repetitions of 30-s work with 240-s recovery; (2) SIE15: 4 repetitions of 15-s work with 15-s recovery, plus 15-s work with 225-s recovery; (3) SIE10: 4 repetitions of 10-s work with 10-s recovery, plus 10-s work and 10-s recovery, plus 10-s work with 220-s recovery.

Results
PPOSIE for SIE30 (697 ± 71 W) was lower than for SIE15 (732 ± 63 W; p = 0.001) and SIE10 (752 ± 75 W; p = 0.001). O2peak response for SIE30 (46.5 ± 6.6 mL kg−1 min−1) was lower than for SIE15 (51.9 ± 4.8 mL kg−1 min−1; p = 0.04) and SIE10 (50.9 ± 5.6 mL kg−1 min−1; p = 0.01). Time spent at O2 ≥ RCP was shorter for SIE30 (32.9 ± 35.9 s) compared to SIE15 (95.0 ± 52.0 s; p = 0.001) and SIE10 (62.9 ± 46.1 s; p = 0.010). No differences were identified for these variables between SIE15 and SIE10 (p = 0.270).

Conclusion
Compared to the SIE30 session, the clustering-based SIE protocols resulted in higher PPOSIE values, a greater O2peak response, and longer time spent at O2 ≥ RCP. Thus, clustering methods can maximize the above-mentioned responses and be appealing alternatives to the traditional 30-s SIE session.

Item Type:	Article
Uncontrolled Keywords:	aerobic training, aerobic capacity, maximal oxygen consumption, peak power output, repeated sprint exercise
Subjects:	B Philosophy. Psychology. Religion > BF Psychology Q Science > QP Physiology R Medicine > RC Internal medicine > RC1200 Sports Medicine
Faculty / School / Research Centre / Research Group:	Faculty of Education, Health & Human Sciences Faculty of Education, Health & Human Sciences > Institute for Lifecourse Development Faculty of Education, Health & Human Sciences > Institute for Lifecourse Development > Centre for Exercise Activity and Rehabilitation Faculty of Education, Health & Human Sciences > School of Human Sciences (HUM)
Last Modified:	03 Jul 2025 08:31
URI:	https://gala.gre.ac.uk/id/eprint/50718

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