Format

Send to

Choose Destination
Eur J Appl Physiol. 2019 May;119(5):1055-1064. doi: 10.1007/s00421-019-04095-9. Epub 2019 Feb 18.

Damage protective effects conferred by low-intensity eccentric contractions on arm, leg and trunk muscles.

Author information

1
Department of Physical Education, National Taiwan Normal University, P.O. Box 97-71, Wenshan Wansheng, Taipei, 11699, Taiwan, Republic of China.
2
Centre for Exercise and Sports Science Research, School of Medical and Health Sciences, Edith Cowan University, Western Australia, Australia.
3
Department of Exercise and Health Sciences, University of Taipei, Taipei, Taiwan, Republic of China.
4
Department of Physical Education, Health and Recreation, National Chiayi University, Chiayi, Taiwan, Republic of China.
5
Department of Athletic Performance, National Taiwan Normal University, Taipei, Taiwan, Republic of China.
6
Department of Physical Education, National Taiwan Normal University, P.O. Box 97-71, Wenshan Wansheng, Taipei, 11699, Taiwan, Republic of China. tcchen@ntnu.edu.tw.

Abstract

PURPOSE:

Low-intensity eccentric contractions with a load corresponding to 10% of maximal voluntary isometric contraction strength (10% EC) attenuate muscle damage in a subsequent bout of higher-intensity eccentric contractions performed within 2 weeks for the elbow flexors, knee flexors and knee extensors. However, it is not known whether this strategy could be applied to other muscles. This study investigated whether 10% EC would confer damage protective effect on high-intensity eccentric contractions (80% EC) for nine different muscle groups.

METHODS:

Untrained young men were placed to an experimental or a control group (n = 12/group). Experimental group performed 50 eccentric contractions with a load corresponding to 10% EC at 2 days prior to 50 eccentric contractions with 80% EC for the elbow flexors and extensors, pectoralis, knee flexors and extensors, plantar flexors, latissimus, abdominis and erector spinae. Control group performed 80% EC without 10% EC. Changes in maximal voluntary isometric contraction strength (MVC) and muscle soreness, plasma creatine kinase (CK) activity and myoglobin concentration after 80% EC were compared between groups by a mixed-factor ANOVA.

RESULTS:

MVC recovered faster (e.g., 6-31% greater MVC at 5 days post-exercise), and peak muscle soreness was 36-54% lower for Experimental than Control group for the nine muscles (P < 0.05). Increases in plasma CK activity and myoglobin concentration were smaller for Experimental (e.g., peak CK: 2763 ± 3459 IU/L) than Control group (120,360 ± 50,158 IU/L).

CONCLUSIONS:

These results showed that 10% EC was effective for attenuating the magnitude of muscle damage after 80% EC for all muscles, although the magnitude of the protective effect differed among the muscles.

KEYWORDS:

Creatine kinase; Delayed-onset muscle soreness; Lengthening contraction; Maximal isometric contraction strength; Rhabdomyolysis

PMID:
30778759
DOI:
10.1007/s00421-019-04095-9

Supplemental Content

Full text links

Icon for Springer
Loading ...
Support Center