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Erschienen in: European Journal of Applied Physiology 11/2021

27.07.2021 | Original Article

Eccentric exercise causes delayed sensory nerve conduction velocity but no repeated bout effect in the flexor pollicis brevis muscles

verfasst von: Eisuke Ochi, Hisashi Ueda, Yosuke Tsuchiya, Koichi Nakazato

Erschienen in: European Journal of Applied Physiology | Ausgabe 11/2021

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Abstract

Purpose

This study was aimed at investigating the effect of eccentric contractions (ECCs) of flexor pollicis brevis muscles (FPBMs) on motor and sensory nerve functions as well as the ipsilateral repeated bout effect (IL-RBE) and contralateral (CL)-RBE of motor and sensory nerve conduction velocities following ECCs.

Methods

Thirty-two young healthy men (age: 19.6 ± 0.2 years, height: 173.2 ± 1.2 cm, body mass: 69.7 ± 1.9 kg) performed two bouts of ECCs. During the first ECCs bout (ECCs-1), all participants performed 100 ECCs with 1 hand; for the second bout, 3 groups (2 weeks [W]: n = 11, 4W: n = 10, 8W: n = 11) performed ECCs with both hands 2, 4, or 8 weeks after ECCs-1. The maximal voluntary isometric contraction (MVC), range of motion (ROM), visual analog scale for pain (VAS), motor and sensory nerve conduction velocities were measured before, immediately after, and 1, 2, 3, and 5 days after ECCs.

Results

ECCs-1 decreased the MVC, limited the ROM, developed VAS, and decreased the motor and sensory nerve conduction velocities compared to non-exercise hand (p < 0.05). The repeated bout effect was observed in the ROM for IL-RBE in 2W and 4W, VAS for IL-RBE in 2 W, and ROM and VAS for CL-RBE in 2W (p < 0.05). However, RBEs of MVC and motor and sensory nerve conduction velocities were not observed, and no differences were confirmed depending on the interval.

Conclusion

In the present study, ECCs of the FPBM caused a sensory nerve dysfunction, while IL- or CL-RBE was not observed.
Literatur
Zurück zum Zitat Nosaka K, Clarkson PM (1995) Muscle damage following repeated bouts of high force eccentric exercise. Med Sci Sports Exerc 27(9):1263–1269CrossRef Nosaka K, Clarkson PM (1995) Muscle damage following repeated bouts of high force eccentric exercise. Med Sci Sports Exerc 27(9):1263–1269CrossRef
Zurück zum Zitat Taylor AD, Humphries B, Smith P, Bronks R (1997) Electrophoretic separation of myosin heavy chain isoforms in the human m. vastus lateralis: references to reproducibility and relationships with force, electromechanical delay, fibre conduction velocity, endurance and electromyography. Arch Physiol Biochem 105(1):10–18. https://doi.org/10.1076/apab.105.1.10.13142CrossRefPubMed Taylor AD, Humphries B, Smith P, Bronks R (1997) Electrophoretic separation of myosin heavy chain isoforms in the human m. vastus lateralis: references to reproducibility and relationships with force, electromechanical delay, fibre conduction velocity, endurance and electromyography. Arch Physiol Biochem 105(1):10–18. https://​doi.​org/​10.​1076/​apab.​105.​1.​10.​13142CrossRefPubMed
Metadaten
Titel
Eccentric exercise causes delayed sensory nerve conduction velocity but no repeated bout effect in the flexor pollicis brevis muscles
verfasst von
Eisuke Ochi
Hisashi Ueda
Yosuke Tsuchiya
Koichi Nakazato
Publikationsdatum
27.07.2021
Verlag
Springer Berlin Heidelberg
Erschienen in
European Journal of Applied Physiology / Ausgabe 11/2021
Print ISSN: 1439-6319
Elektronische ISSN: 1439-6327
DOI
https://doi.org/10.1007/s00421-021-04773-7

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