低速上坡运动增加了脑部记忆和学习区域的乳酸和脑衍生神经营养因子
Masaki Takimoto1, Taku Hamada1
1Laboratory of Exercise Physiology and Biochemistry, Graduate School of Sport and Exercise Sciences, Osaka University of Health and Sport Sciences (OUHS), Osaka, Japan.
Neuroscience research
|February 11, 2025
概括
长时间的,低速的上坡运动会增加大脑乳酸和大脑衍生神经营养因子 (BDNF) 在老鼠中. 这种类型的运动招募快速动的肌肉,影响对记忆和学习至关重要的大脑区域.
科学领域:
- 运动生理学 运动生理学
- 神经科学是一个神经科学.
- 生物化学 生物化学
背景情况:
- 大脑衍生神经营养因子 (BDNF) 对神经元可塑性,学习和记忆至关重要.
- 乳酸盐,传统上被视为代谢废物,越来越多地被认为对大脑功能的作用.
- 不同的运动强度和倾向对大脑神经化学的影响仍然是一个活跃的研究领域.
研究的目的:
- 为了研究低速上坡运动对血液和大脑乳酸水平的急性影响.
- 为了检查这种运动类型对大脑衍生神经营养因子 (BDNF) 在皮质和海马体表达的影响.
- 为了确定上坡运动引起的大脑乳酸的增加是否与血液乳酸水平有关.
主要方法:
- 雄性Sprague Dawley大鼠被分配到对照,平面运动 (平面-EX) 或上坡运动 (上坡-EX) 组.
- 运动涉及跑步机以低速 (13米/分钟) 在0% (平面) 或40% (上坡) 的梯度上运行30或90分钟.
- 测量了乳酸水平,肌肉和大脑的葡萄糖原以及BDNF蛋白. 用于评估血液-大脑乳酸转移,给药的是乳酸.
主要成果:
- 上坡运动,与平面运动不同,在血液和大脑中显著增加了乳酸水平.
- 肌肉糖原在上坡运动中减少,这表明快速抽纤维的招募,而脑糖原保持不变.
- 长时间 (90分钟) 的上坡运动在皮质和海马体中提高了BDNF蛋白质水平,而平面运动则没有.
结论:
- 低速,长时间的上坡运动会急剧提高大脑的乳酸盐水平,可能来自血液.
- 这种运动方式还可以增强BDNF在关键大脑区域的表达,这些区域参与记忆和学习.
- 这些发现强调了特定的运动方案的神经化学益处,即使在低速度,对于认知功能.
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