Damage protective effects conferred by low-intensity eccentric contractions on arm, leg and trunk muscles
| Autor: | Ho Seng Wang, Tai Ying Chou, Hsin Lian Chen, Min Jyue Huang, Trevor C. Chen, Kuo-Wei Tseng, Kazunori Nosaka |
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| Rok vydání: | 2019 |
| Předmět: |
Physiology
Elbow Eccentric contractions Isometric exercise Young Adult Isometric Contraction Physiology (medical) Delayed onset muscle soreness medicine Humans Orthopedics and Sports Medicine Muscle Strength Muscle Skeletal Leg biology business.industry Public Health Environmental and Occupational Health Torso Myalgia General Medicine musculoskeletal system medicine.disease Exercise Therapy Intensity (physics) body regions medicine.anatomical_structure Anesthesia Arm biology.protein Creatine kinase Analysis of variance medicine.symptom business Rhabdomyolysis |
| Zdroj: | European Journal of Applied Physiology. 119:1055-1064 |
| ISSN: | 1439-6327 1439-6319 |
| Popis: | 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. 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. 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 |
| Databáze: | OpenAIRE |
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