TY - JOUR
T1 - Eccentric exercise-induced muscle damage of pre-adolescent and adolescent boys in comparison to young men
AU - Chen, Trevor C.
AU - Chen, Hsin Lian
AU - Liu, Yi Chuen
AU - Nosaka, Kazunori
N1 - Funding Information:
Acknowledgments We would like to dedicate this article to Professor Priscilla M. clarkson (University of Massachusetts) who passed away on 25th of August 2013. She has been mentoring and inspiring us for more than 20 years, and our passion on muscle damage research was given by her. We thank Mr. Shueh-chien Ko for his assistance in data collection, and Mr. cheng-Yuang lu for his assistance in subject recruitment. this research was supported by the national Science council (nSc 101-2628-H-415-001), “Aim for the top University Plan” of national taiwan normal University and the Ministry of Education, tAIWAn.
PY - 2014/6
Y1 - 2014/6
N2 - Purpose: This study compared changes in indirect muscle damage markers after maximal eccentric exercise of the elbow flexors (EF) among pre-adolescent (9-10 years), adolescent (14-15 years) and post-adolescent (20-25 years) men to test the hypothesis that the magnitude of muscle damage would increase with increase in age. Methods: Thirteen untrained men of each age group performed two bouts (ECC1, ECC2) of 30 maximal EF eccentric contractions. Several indirect muscle damage markers were measured from the exercised arm before, immediately after, and 1-5 days post-exercise. Changes in maximal voluntary concentric contraction torque of the EF (MVC), range of motion of the elbow joint, upper arm circumference (CIR), muscle passive stiffness, muscle soreness, plasma creatine kinase activity and myoglobin concentration after ECC1 and ECC2 were compared amongst groups by a mixed-design two-way ANOVA. Results: MVC before exercise was smaller (P < 0.05) for pre-adolescent (8.9 ± 1.9 Nm) than adolescent (25.1 ± 3.9 Nm) and adult (35.3 ± 4.6 Nm), and for adolescent than adult. Changes in all variables after ECC1 were smaller (P < 0.05) for pre-adolescent and adolescent when compared with adult, and all except CIR changes were smaller (P < 0.05) for pre-adolescent than adolescent. After ECC2, changes in all variables were smaller (P < 0.05) than those after ECC1 for all groups, but the magnitude of the changes was different among groups (P < 0.05) in the same way as that after ECC1. Conclusion: These results indicate that the magnitude of muscle damage is increased from pre-adolescent, adolescent to post-adolescent men.
AB - Purpose: This study compared changes in indirect muscle damage markers after maximal eccentric exercise of the elbow flexors (EF) among pre-adolescent (9-10 years), adolescent (14-15 years) and post-adolescent (20-25 years) men to test the hypothesis that the magnitude of muscle damage would increase with increase in age. Methods: Thirteen untrained men of each age group performed two bouts (ECC1, ECC2) of 30 maximal EF eccentric contractions. Several indirect muscle damage markers were measured from the exercised arm before, immediately after, and 1-5 days post-exercise. Changes in maximal voluntary concentric contraction torque of the EF (MVC), range of motion of the elbow joint, upper arm circumference (CIR), muscle passive stiffness, muscle soreness, plasma creatine kinase activity and myoglobin concentration after ECC1 and ECC2 were compared amongst groups by a mixed-design two-way ANOVA. Results: MVC before exercise was smaller (P < 0.05) for pre-adolescent (8.9 ± 1.9 Nm) than adolescent (25.1 ± 3.9 Nm) and adult (35.3 ± 4.6 Nm), and for adolescent than adult. Changes in all variables after ECC1 were smaller (P < 0.05) for pre-adolescent and adolescent when compared with adult, and all except CIR changes were smaller (P < 0.05) for pre-adolescent than adolescent. After ECC2, changes in all variables were smaller (P < 0.05) than those after ECC1 for all groups, but the magnitude of the changes was different among groups (P < 0.05) in the same way as that after ECC1. Conclusion: These results indicate that the magnitude of muscle damage is increased from pre-adolescent, adolescent to post-adolescent men.
KW - Delayed onset muscle soreness
KW - Elbow flexors
KW - Lengthening contraction
KW - Maximal voluntary contraction
KW - Puberty
KW - Repeated bout effect
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U2 - 10.1007/s00421-014-2848-3
DO - 10.1007/s00421-014-2848-3
M3 - Article
C2 - 24563093
AN - SCOPUS:84901462331
SN - 1439-6319
VL - 114
SP - 1183
EP - 1195
JO - European Journal of Applied Physiology
JF - European Journal of Applied Physiology
IS - 6
ER -
