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Erschienen in: European Journal of Applied Physiology 5/2020

13.03.2020 | Original Article

Comparison between high- and low-intensity eccentric cycling of equal mechanical work for muscle damage and the repeated bout effect

verfasst von: Georgios Mavropalias, Tomoko Koeda, Oliver R. Barley, Wayne C. K. Poon, Aiden J. Fisher, Anthony J. Blazevich, Kazunori Nosaka

Erschienen in: European Journal of Applied Physiology | Ausgabe 5/2020

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Abstract

Purpose

We compared high- and low-intensity eccentric cycling (ECC) with the same mechanical work for changes in muscle function and muscle soreness, and examined the changes after subsequent high-intensity ECC.

Methods

Twenty men performed either high-intensity ECC (1 min × 5 at 20% of peak power output: PPO) for two bouts separated by 2 weeks (H–H, n = 11), or low-intensity (4 min × 5 at 5% PPO) for the first and high-intensity ECC for the second bout (L–H, n = 9). Changes in indirect muscle damage markers were compared between groups and bouts.

Results

At 24 h after the first bout, both groups showed similar decreases in maximal isometric (70° knee angle,  − 10.6 ± 11.8%) and isokinetic ( − 11.0 ± 8.2%) contraction torque of the knee extensors (KE), squat ( − 7.7 ± 10.4%) and counter-movement jump ( − 5.9 ± 8.4%) heights (p < 0.05). Changes in KE torque and jump height were smaller after the second than the first bout for both the groups (p < 0.05). Increases in plasma creatine kinase activity were small, and no significant changes in vastus lateralis or intermedius thickness nor ultrasound echo-intensity were observed. KE soreness with palpation was greater (p < 0.01) in H–H (peak: 4.2 ± 1.0) than L–H (1.4 ± 0.6) after the first bout, but greater in L–H (3.6 ± 0.9) than H–H (1.5 ± 0.5) after the second bout. This was also found for muscle soreness with squat, KE stretch and gluteal palpation.

Conclusion

The high- and low-intensity ECC with matched mechanical work induced similar decreases in muscle function, but DOMS was greater after high-intensity ECC, which may be due to greater extracellular matrix damage and inflammation.
Literatur
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Metadaten
Titel
Comparison between high- and low-intensity eccentric cycling of equal mechanical work for muscle damage and the repeated bout effect
verfasst von
Georgios Mavropalias
Tomoko Koeda
Oliver R. Barley
Wayne C. K. Poon
Aiden J. Fisher
Anthony J. Blazevich
Kazunori Nosaka
Publikationsdatum
13.03.2020
Verlag
Springer Berlin Heidelberg
Erschienen in
European Journal of Applied Physiology / Ausgabe 5/2020
Print ISSN: 1439-6319
Elektronische ISSN: 1439-6327
DOI
https://doi.org/10.1007/s00421-020-04341-5

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