Effect of concurrent strength and endurance training on skeletal muscle properties and hormone concentrations in humans
| Autor: | H. A. Quinney, Daniel G. Syrotuik, Gordon J. Bell, Robert S. Burnham, T. P. Martin |
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| Rok vydání: | 2000 |
| Předmět: |
Adult
Male medicine.medical_specialty Hydrocortisone Physiology Strength training Muscle Fibers Skeletal education Physical exercise Oxygen Consumption Endurance training Physiology (medical) Internal medicine One-repetition maximum medicine Humans Orthopedics and Sports Medicine Muscle Skeletal Leg press Testosterone business.industry Public Health Environmental and Occupational Health Skeletal muscle VO2 max General Medicine Aerobiosis Hormones Capillaries Endocrinology medicine.anatomical_structure Physical Fitness Regional Blood Flow Physical Endurance Female business |
| Zdroj: | European Journal of Applied Physiology. 81:418-427 |
| ISSN: | 1439-6327 1439-6319 |
| DOI: | 10.1007/s004210050063 |
| Popis: | The purpose of this study was to investigate the eAect of concurrent strength and endurance training on strength, endurance, endocrine status and muscle fi- bre properties. A total of 45 male and female subjects were randomly assigned to one of four groups; strength training only (S), endurance training only (E), concur- rent strength and endurance training (SE), or a control group (C). Groups S and E trained 3 days a week and the SE group trained 6 days a week for 12 weeks. Tests were made before and after 6 and 12 weeks of training. There was a similar increase in maximal oxygen con- sumption ( _ V O2max) in both groups E and SE (P < 0.05). Leg press and knee extension one repetition maximum (1 RM) was increased in groups S and SE (P < 0.05) but the gains in knee extension 1 RM were greater for group S compared to all other groups (P < 0.05). Types I and II muscle fibre area increased after 6 and 12 weeks of strength training and after 12 weeks of combined training in type II fibres only (P < 0.05). Groups SE and E had an increase in succinate dehydrogenase activity and group E had a decrease in adenosine triphosphatase after 12 weeks of training (P < 0.05). A significant increase in capillary per fibre ratio was noted after 12 weeks of training in group SE. No changes were observed in testosterone, human growth hormone or sex hormone binding glob- ulin concentrations for any group but there was a greater urinary cortisol concentration in the women of group SE and decrease in the men of group E after 12 weeks of training (P < 0.05). These findings would support the contention that combined strength and en- durance training can suppress some of the adaptations to strength training and augment some aspects of cap- illarization in skeletal muscle. |
| Databáze: | OpenAIRE |
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