亚细胞骨肌糖原池的差异性利用:在1到15分钟的最大运动量之间进行比较分析
Camilla Tvede Schytz1, Niels Ørtenblad1, Kasper Degn Gejl1
1Department of Sports Science and Clinical Biomechanics, Faculty of Health Sciences, University of Southern Denmark, Odense, Denmark.
The Journal of physiology
|March 19, 2024
概括
运动强度会影响骨肌肉的糖原使用,使用间肌纤维储存更短的爆发,使用内肌纤维储存更长的努力. 饮食影响糖原的储存大小和分布.
科学领域:
- 运动生理学 运动生理学
- 骨肌肉的新陈代谢
- 营养生物化学 营养生物化学
背景情况:
- 骨肌中的糖原颗粒存在于不同的亚细胞位置:intermyofibrillar,intramyofibrillar和subsarcolemmal.
- 这些位置因距离线粒体的距离而异,可能会影响糖原降解速率.
- 了解糖原池的利用和储存对于优化运动表现和恢复至关重要.
研究的目的:
- 研究运动强度和持续时间如何影响不同的骨肌肉糖原池的利用.
- 为了检查减少碳水化合物和能量摄入对运动后糖原储存的影响.
- 为了将运动诱导的糖原分解与饮食操纵和亚细胞糖原动力学相关联.
主要方法:
- 20名参与者在交叉设计中完成了1分钟或15分钟的最大自行车测试.
- 参与者在运动前食用高 (10 g/kg BM) 或中等 (4 g/kg BM) 的碳水化合物饮食.
- 肌肉活检分析了运动前后的糖原颗粒大小,数值密度和亚细胞局部.
主要成果:
- 在1分钟的最大运动过程中,优选使用了intermyofibrillar糖原.
- 在15分钟的最大运动期间,偏好使用了内肌纤维素甘氨酸.
- 减少碳水化合物/能量摄入量减少了特定池中的糖原颗粒大小和数值密度.
结论:
- 运动强度对骨肌肉中亚细胞糖原池的利用有不同的影响.
- 饮食中的碳水化合物和能量摄入量显著影响糖原颗粒大小和亚细胞分布.
- 这些发现突出了运动,饮食和肌肉糖原动力学之间的相互作用.
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