The influence of muscle metabolic characteristics on physical performance
| Autor: | Dan S. Sharp, William L. Daniels, James A. Vogel, Per A. Tesch, Bertil Sjödin, James E. Wright |
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| Rok vydání: | 1985 |
| Předmět: |
Adult
Male medicine.medical_specialty Physiology Physical exercise chemistry.chemical_compound Oxygen Consumption Physiology (medical) Lactate dehydrogenase Internal medicine medicine Humans Citrate synthase Orthopedics and Sports Medicine Aerobic capacity biology Muscle fatigue Chemistry Muscles Public Health Environmental and Occupational Health General Medicine Endocrinology Biochemistry Physical Fitness Lactates biology.protein Creatine kinase Anaerobic exercise Phosphofructokinase |
| Zdroj: | European Journal of Applied Physiology and Occupational Physiology. 54:237-243 |
| ISSN: | 1439-6327 0301-5548 |
| DOI: | 10.1007/bf00426139 |
| Popis: | This study describes the influence of muscle fiber type composition, enzyme activities and capillary supply on muscle strength, local muscle endurance or aerobic power and capacity. Muscle biopsies were obtained from m. vastus lateralis in thirteen physically active men. Histochemical staining procedures were applied to assess the percentage of fast twitch (FT) fibers, muscle fiber area, and capillary density. Also, the activity of citrate synthase (CS), creatine kinase (CK), hexokinase (HK), lactate dehydrogenase (LDH), and phosphofructokinase (PFK) were analysed using fluorometrical assays. Peak torque at ‘low’ and ‘high’ angular velocities was measured during leg extension. Similarly, muscle fatigue (e. g. peak torque decline) and recovery from a short-term exercise task were measured during maximal, voluntary consecutive leg extensions. Aerobic power ( $$\dot V_{{\text{O}}_{{\text{2max}}} }$$ ) and aerobic capacity (e.g. onset of blood lactate concentration; OBLA), as defined by a blood lactate concentration of 4 mol · l−1 were measured during cycling. Peak torque at a high angular velocity was positively correlated with % FT area (p |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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