journal article Feb 07, 2019

Damage and the repeated bout effect of arm, leg, and trunk muscles induced by eccentric resistance exercises

View at Publisher Save 10.1111/sms.13388
Abstract
This study compared nine resistance eccentric exercises targeting arm, leg, and trunk muscles in one session for changes in maximal voluntary isometric contraction strength (MVC), delayed onset muscle soreness (DOMS), plasma creatine kinase (CK) activity, and myoglobin (Mb) concentration after the first and second bouts. Fifteen sedentary men (20‐25 years) performed 5 sets of 10 eccentric contractions with 80% of MVC load for the elbow flexors (EF), elbow extensors (EE), pectoralis, knee extensors (KE), knee flexors (KF), plantar flexors (PF), latissimus, abdominis, and erector spinae (ES) in a randomized order and repeated the same exercises 2 weeks later. MVC decreased at 1 (16%‐57%) to 4 (13%‐49%) days, DOMS developed (peak: 43‐70 mm), and CK activity (peak: 23 238‐207 304 IU/L) and Mb concentration showed large increases after the first bout. The magnitude of decrease in MVC was greater (P < 0.05) for EF, EE, and PEC than others and for KF than KE, PF, and ES. DOMS was greater (P < 0.05) for EF, EE, and ES than others. Changes in all measures were smaller (P < 0.05) after the second than the first bout, and the magnitude of the repeated bout effect was similar among the muscles. Plasma CK activity and Mb concentration did not increase significantly after the second exercise bout. It was concluded that muscle damage was greater for arm than leg muscles, and muscle proteins in the blood increased to a critical level after unaccustomed whole‐body resistance exercises, but the magnitude of damage was largely attenuated for all muscles similarly after the second bout.
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References
36
[2]
U.S. Department of Health and Human Services.Physical Activity Guidelines for Americans 2nd ed.Washington DC:U.S. Department of Health and Human Services;2018.https://health.gov/paguidelines/second-edition/Updated December 28 2018. Accessed December 28 2018.
[11]
Serum Creatine Kinase Levels and Renal Function Measures in Exertional Muscle Damage

PRISCILLA M. CLARKSON, AMY K. KEARNS, PIERRE ROUZIER et al.

Medicine & Science in Sports & Exercise 10.1249/01.mss.0000210192.49210.fc
[21]
NelsonAG KokkonenJ.Stretching Anatomy 2nd ed.Champaign IL:Human Kinetics;2014. 22‐23 33 43‐44 78‐79 82‐83 122‐123 128‐129 150‐151 p.
[23]
Recommended effect size statistics for repeated measures designs

Roger Bakeman

Behavior Research Methods 10.3758/bf03192707
[32]
Statin-Associated Myopathy

Paul D. Thompson, Priscilla Clarkson, Richard H. Karas

JAMA 10.1001/jama.289.13.1681