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cover of episode Exercise Physiology | Temperature Regulation during Exercise (Part 11)

Exercise Physiology | Temperature Regulation during Exercise (Part 11)

2025/6/28
logo of podcast Dr. Matt and Dr. Mike's Medical Podcast

Dr. Matt and Dr. Mike's Medical Podcast

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Dr. Mike Todorovic
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Dr. Mike Todorovic: 作为恒温动物,我们需要维持核心体温,平衡热量产生和散失。体温过高或过低都会影响酶的功能,而酶在体内执行各种功能。我们的身体更像一个火炉系统,擅长产生和释放热量。身体更容易散失热量,而不是维持体温。热量来自身体的代谢过程,只有20%到30%的宏量营养素能有效地转化为能量,其余的都产生热量。运动时,肌肉收缩会产生更多热量,因此我们需要一个良好的系统来散发热量。体温调节是通过调整热量散失来实现的。如果体温过高,我们要让热量尽可能接近皮肤以便释放;如果体温过低,我们要让热量远离皮肤。 Matt: 核心体温是37摄氏度,由下丘脑控制。身体里有两种温度传感器:皮肤上的和脊髓及下丘脑里的。皮肤上的温度感受器可以感知环境温度的变化。核心温度感受器对改变生理过程以散热或保暖更重要。皮肤温度会根据环境变化,运动生理学家需要确保核心和皮肤之间的梯度得以维持,以便散热。如果体温调节不好,体温升高,表现就会下降。皮肤温度通常比体温低四度,但在寒冷环境中可能低20度。热量通过血液循环进行分配,这是一种对流阻力。

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How does your body manage heat during a workout? And can training in hot or cold conditions make you better or worse? 

*This content is for educational purposes only and does not constitute medical advice.

 

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