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- Title
Chicken breast attenuates high-intensity-exercise-induced decrease in rat sarcoplasmic reticulum Ca2 handling.
- Authors
Mishima T; Yamada T; Sakamoto M; Sugiyama M; Matsunaga S; Maemura H; Shimizu M; Takahata Y; Morimatsu F; Wada M
- Abstract
This study was conducted to determine whether dietary chicken-breast extract (CBEX), a rich source of histidine-containing dipeptides, could modify exercise-induced changes in sarcoplasmic reticulum (SR) function. After 5 weeks of dietary CBEX, SR Ca2+-handling ability was examined in the vastus lateralis muscles of rats subjected to high-intensity running for 2.5 min. Dietary CBEX caused an approximately 15% and 45% increase (p < .01) in muscle carnosine and anserine concentrations, respectively. In resting muscles, depressions in SR Ca2+-ATPase activity were evoked by dietary CBEX without concomitant changes in SR Ca2+ uptake and release rates. The data confirm that high-intensity exercise depresses SR Ca2+ handling. In spite of the same run time, SR Ca2+ handling was reduced to a lesser degree in muscles of CBEX-containing-chow-fed rats than in standard-chow-fed rats (p < .05). These results suggest that dietary CBEX might attenuate deteriorations in SR Ca2+-handling ability that occur with high-intensity exercise.
- Publication
International Journal of Sport Nutrition & Exercise Metabolism, 2008, Vol 18, Issue 4, p399
- ISSN
1526-484X
- Publication type
Journal Article
- DOI
10.1123/ijsnem.18.4.399