Low-intensity elbow flexion eccentric contractions attenuate maximal eccentric exercise-induced muscle damage of the contralateral arm

Trevor C. Chen, Ming Ju Lin, Jian Han Lai, Hsin Lian Chen, Hui I. Yu, Kazunori Nosaka

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Objectives: The magnitude of muscle damage induced by maximal eccentric contractions (MaxEC) of the elbow flexors (EF) is reduced when it is preceded by low-intensity (10% of maximal voluntary isometric contraction strength) eccentric contractions (10%EC) of the same muscle, or by MaxEC of the opposite EF. This study investigated whether 10%EC would reduce the magnitude of muscle damage after MaxEC performed by the opposite arm. Design: Comparison among 6 groups for changes in indirect markers of muscle damage. Method: Young (21.0 ± 1.8 years) untrained men were assigned to five experimental groups (n = 13/group) that performed 30, 10%EC followed by 30 MaxEC of the other arm performed at either 1 (1d), 2 (2d), 7 (1wk), 14 (2wk) or 21 days (3wk) later, and one control group that performed 30 MaxEC without 10%EC (n = 13). Changes in several indirect markers of muscle damage after MaxEC were compared among the groups by mixed-design two-way ANOVAs. Results: No significant changes in maximal voluntary concentric contraction torque, plasma creatine kinase activity and muscle soreness were evident after 10%EC. Changes in these variables after MaxEC were smaller (p < 0.05) for the 1d, 2d and 1wk groups than control group, without significant differences between the 1d, 2d and 1wk groups. No significance differences in the changes were evident among the 2wk, 3wk and control groups, except for muscle soreness showing smaller (p < 0.05) increases for the 2wk and 3wk groups than control group. Conclusions: These results showed that 10%EC conferred muscle damage protection to the contralateral arm that performed MaxEC.

Original languageEnglish
Pages (from-to)1068-1072
Number of pages5
JournalJournal of Science and Medicine in Sport
Volume21
Issue number10
DOIs
Publication statusPublished - 2018 Oct 1

Fingerprint

Elbow
Arm
Exercise
Muscles
Control Groups
Myalgia
Isometric Contraction
Torque
Creatine Kinase
Analysis of Variance

Keywords

  • Creatine kinase
  • Cross transfer effect
  • Delayed onset muscle soreness
  • Elbow flexors
  • Muscle strength
  • Repeated bout effect

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine
  • Physical Therapy, Sports Therapy and Rehabilitation

Cite this

Low-intensity elbow flexion eccentric contractions attenuate maximal eccentric exercise-induced muscle damage of the contralateral arm. / Chen, Trevor C.; Lin, Ming Ju; Lai, Jian Han; Chen, Hsin Lian; Yu, Hui I.; Nosaka, Kazunori.

In: Journal of Science and Medicine in Sport, Vol. 21, No. 10, 01.10.2018, p. 1068-1072.

Research output: Contribution to journalArticle

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abstract = "Objectives: The magnitude of muscle damage induced by maximal eccentric contractions (MaxEC) of the elbow flexors (EF) is reduced when it is preceded by low-intensity (10{\%} of maximal voluntary isometric contraction strength) eccentric contractions (10{\%}EC) of the same muscle, or by MaxEC of the opposite EF. This study investigated whether 10{\%}EC would reduce the magnitude of muscle damage after MaxEC performed by the opposite arm. Design: Comparison among 6 groups for changes in indirect markers of muscle damage. Method: Young (21.0 ± 1.8 years) untrained men were assigned to five experimental groups (n = 13/group) that performed 30, 10{\%}EC followed by 30 MaxEC of the other arm performed at either 1 (1d), 2 (2d), 7 (1wk), 14 (2wk) or 21 days (3wk) later, and one control group that performed 30 MaxEC without 10{\%}EC (n = 13). Changes in several indirect markers of muscle damage after MaxEC were compared among the groups by mixed-design two-way ANOVAs. Results: No significant changes in maximal voluntary concentric contraction torque, plasma creatine kinase activity and muscle soreness were evident after 10{\%}EC. Changes in these variables after MaxEC were smaller (p < 0.05) for the 1d, 2d and 1wk groups than control group, without significant differences between the 1d, 2d and 1wk groups. No significance differences in the changes were evident among the 2wk, 3wk and control groups, except for muscle soreness showing smaller (p < 0.05) increases for the 2wk and 3wk groups than control group. Conclusions: These results showed that 10{\%}EC conferred muscle damage protection to the contralateral arm that performed MaxEC.",
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T1 - Low-intensity elbow flexion eccentric contractions attenuate maximal eccentric exercise-induced muscle damage of the contralateral arm

AU - Chen, Trevor C.

AU - Lin, Ming Ju

AU - Lai, Jian Han

AU - Chen, Hsin Lian

AU - Yu, Hui I.

AU - Nosaka, Kazunori

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N2 - Objectives: The magnitude of muscle damage induced by maximal eccentric contractions (MaxEC) of the elbow flexors (EF) is reduced when it is preceded by low-intensity (10% of maximal voluntary isometric contraction strength) eccentric contractions (10%EC) of the same muscle, or by MaxEC of the opposite EF. This study investigated whether 10%EC would reduce the magnitude of muscle damage after MaxEC performed by the opposite arm. Design: Comparison among 6 groups for changes in indirect markers of muscle damage. Method: Young (21.0 ± 1.8 years) untrained men were assigned to five experimental groups (n = 13/group) that performed 30, 10%EC followed by 30 MaxEC of the other arm performed at either 1 (1d), 2 (2d), 7 (1wk), 14 (2wk) or 21 days (3wk) later, and one control group that performed 30 MaxEC without 10%EC (n = 13). Changes in several indirect markers of muscle damage after MaxEC were compared among the groups by mixed-design two-way ANOVAs. Results: No significant changes in maximal voluntary concentric contraction torque, plasma creatine kinase activity and muscle soreness were evident after 10%EC. Changes in these variables after MaxEC were smaller (p < 0.05) for the 1d, 2d and 1wk groups than control group, without significant differences between the 1d, 2d and 1wk groups. No significance differences in the changes were evident among the 2wk, 3wk and control groups, except for muscle soreness showing smaller (p < 0.05) increases for the 2wk and 3wk groups than control group. Conclusions: These results showed that 10%EC conferred muscle damage protection to the contralateral arm that performed MaxEC.

AB - Objectives: The magnitude of muscle damage induced by maximal eccentric contractions (MaxEC) of the elbow flexors (EF) is reduced when it is preceded by low-intensity (10% of maximal voluntary isometric contraction strength) eccentric contractions (10%EC) of the same muscle, or by MaxEC of the opposite EF. This study investigated whether 10%EC would reduce the magnitude of muscle damage after MaxEC performed by the opposite arm. Design: Comparison among 6 groups for changes in indirect markers of muscle damage. Method: Young (21.0 ± 1.8 years) untrained men were assigned to five experimental groups (n = 13/group) that performed 30, 10%EC followed by 30 MaxEC of the other arm performed at either 1 (1d), 2 (2d), 7 (1wk), 14 (2wk) or 21 days (3wk) later, and one control group that performed 30 MaxEC without 10%EC (n = 13). Changes in several indirect markers of muscle damage after MaxEC were compared among the groups by mixed-design two-way ANOVAs. Results: No significant changes in maximal voluntary concentric contraction torque, plasma creatine kinase activity and muscle soreness were evident after 10%EC. Changes in these variables after MaxEC were smaller (p < 0.05) for the 1d, 2d and 1wk groups than control group, without significant differences between the 1d, 2d and 1wk groups. No significance differences in the changes were evident among the 2wk, 3wk and control groups, except for muscle soreness showing smaller (p < 0.05) increases for the 2wk and 3wk groups than control group. Conclusions: These results showed that 10%EC conferred muscle damage protection to the contralateral arm that performed MaxEC.

KW - Creatine kinase

KW - Cross transfer effect

KW - Delayed onset muscle soreness

KW - Elbow flexors

KW - Muscle strength

KW - Repeated bout effect

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