Lipid Metabolism for Exercise Prescription (II)
【Supercategory：7. DESCENTE SPORTS SCIENCE Subcategory：7.7 Vol.7】
Exercise was loaded to rats and healthy young men and characteristics of lipid metabolism during exercise was investigated quantitively and qualitatively. Following results were obtained;
1. By using bicycle ergometer, exercise was loaded to the men at 130 beats/min of heart rate for an hour. Serum FFA significantly increased and especially oleic acid (C₁₈₌₁) increased. But there were not any changes in serum TG, PL, and CE and in each fatty acid composition.
2. By repetitious forced swimmings to the rats, following results were obtained;
1) Mobilization of serum FFA during the swimming was biphasic and the former had longer and larger than the latter. These mobilization phases were mostly depended on WAT-TG lipolysis. Unsaturated fatty acids (C₁₈₌₁, C₁₈₌₂) in serum initially increased and these increase were maintained up to the end of the swimming.
2) Significant decreases of serum TG and CHE appeared at decrease of serum FFA during the swimming. But there were not changes in these fatty acid compositions.
3) Heart and skeletal muscle -TG showed initial decrease and remained the period when serum FFA mobilized to the peak and fall to the normal level. But in the latter mobilization phase of serum FFA these TGs began to decrease again. However, liver-TG reversely increased with increase of oleic acid composition, despite of remarkable decrease of serum-TG.
4) Tissue phospholipids, PE and PC, remarkably decreased at the beginning of swimming and showed re-bounding recovery. But at the end of the swimming these lipids decreased. Changes in fatty acid composition of these lipids appeared at the time when these lipids decreased, and antagonistic relation between C₁₈ and C₂₀₌₄ appeared. Amounts of CL of heart, skeletal muscle and liver increased during the swimming. But at the end of the swimming, these amount decreased with increase of C₁₈₌₂ composition of CL. Especially, the amount of CL in skeletal muscle lowered under normal level drastically.
From these results, different influences of amounts of exercise on lipid metabolism appeared in the characteristics of serum FFA mobilization. On each stage in the characteristics, amount of exercise influenced on lipid metabolism, amount of phospholipids and fatty acid composition of these lipids, respectively, and then, significance of the optimum amount of exercise for exercise prescription was clarified as a lipid metabolism.
DESCENTE SPORTS SCIENCE Vol.7/THE DESCENTE AND ISHIMOTO MEMORIAL FOUNDATION FOR THE PROMOTION SPORTS SCIENCE
1. By using bicycle ergometer, exercise was loaded to the men at 130 beats/min of heart rate for an hour. Serum FFA significantly increased and especially oleic acid (C₁₈₌₁) increased. But there were not any changes in serum TG, PL, and CE and in each fatty acid composition.
2. By repetitious forced swimmings to the rats, following results were obtained;
1) Mobilization of serum FFA during the swimming was biphasic and the former had longer and larger than the latter. These mobilization phases were mostly depended on WAT-TG lipolysis. Unsaturated fatty acids (C₁₈₌₁, C₁₈₌₂) in serum initially increased and these increase were maintained up to the end of the swimming.
2) Significant decreases of serum TG and CHE appeared at decrease of serum FFA during the swimming. But there were not changes in these fatty acid compositions.
3) Heart and skeletal muscle -TG showed initial decrease and remained the period when serum FFA mobilized to the peak and fall to the normal level. But in the latter mobilization phase of serum FFA these TGs began to decrease again. However, liver-TG reversely increased with increase of oleic acid composition, despite of remarkable decrease of serum-TG.
4) Tissue phospholipids, PE and PC, remarkably decreased at the beginning of swimming and showed re-bounding recovery. But at the end of the swimming these lipids decreased. Changes in fatty acid composition of these lipids appeared at the time when these lipids decreased, and antagonistic relation between C₁₈ and C₂₀₌₄ appeared. Amounts of CL of heart, skeletal muscle and liver increased during the swimming. But at the end of the swimming, these amount decreased with increase of C₁₈₌₂ composition of CL. Especially, the amount of CL in skeletal muscle lowered under normal level drastically.
From these results, different influences of amounts of exercise on lipid metabolism appeared in the characteristics of serum FFA mobilization. On each stage in the characteristics, amount of exercise influenced on lipid metabolism, amount of phospholipids and fatty acid composition of these lipids, respectively, and then, significance of the optimum amount of exercise for exercise prescription was clarified as a lipid metabolism.
DESCENTE SPORTS SCIENCE Vol.7/THE DESCENTE AND ISHIMOTO MEMORIAL FOUNDATION FOR THE PROMOTION SPORTS SCIENCE
| Researcher | Suketsune Iwagaki*1, Masatoshi Kazami*1, Masayuki Watanabe*2, Keizo Kobayashi*3 |
|---|---|
| University or institution | *1 Tokai University, *2 Tokyo Gakugei University, *3 Tokyo Jikei University |
Keywords