201. Break point of serum creatine kinase release after endurance exercise
- Author
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Kazuo Sugawara, Koki Sato, Katsuhiko Suzuki, Manabu Totsuka, and Shigeyuki Nakaji
- Subjects
Adult ,Male ,medicine.medical_specialty ,Physiology ,Physical exercise ,Fatty Acids, Nonesterified ,Break point ,Endurance training ,Physiology (medical) ,Internal medicine ,Medicine ,Humans ,Knee ,Exercise physiology ,Muscle, Skeletal ,Creatine Kinase ,Exercise ,biology ,business.industry ,Overtraining ,medicine.disease ,Quadriceps femoris muscle ,Isoenzymes ,Endocrinology ,Thigh ,biology.protein ,Body Composition ,Physical Endurance ,Creatine kinase ,business ,Anaerobic exercise - Abstract
We investigated whether there is a break point of creatine kinase (CK) release after daily endurance exercise and whether CK response depends on individual physical characteristics. Fifteen healthy young men performed 90 min of bicycle exercise for 3 consecutive days. Body composition, properties of the quadriceps femoris muscle (QFM), and aerobic and anaerobic capacities were estimated before the test. Blood samples were obtained 22 times during the experimental period. Endurance exercise significantly elevated serum CK from 3 h after the first exercise session ( P < 0.05) and gradually increased thereafter. Subjects were classified into two groups according to their peak CK values: high responders (HR; >500 IU/l of CK) and low responders (LR
- Published
- 2002