What goes on inside your brain when you exercise?
当你锻炼时你的大脑内部酝酿着什么？
If it's dark when you exercise outside, wear reflective clothing.
如果天色暗时在室外锻炼，则需要穿上可以反光的衣服。
Winter weather means taking special precautions when you exercise outside.
冬天寒冷的天气需要我们在进行室外锻炼的时候格外注意。
Many teenagers are surprised to learn that when you exercise, your body produces some chemicals that make you feel relaxed and increase your ability to concentrate when you study.
许多青少年听说体育锻炼可以使身体产生帮助放松精神、促进集中注意力的化学物质时都觉得吃惊。
Why does your heart rate increase when you exercise?
为何心率会在你运动时加快？
For example, when you exercise a lot, you make more mitochondria.
例如，当你运动很多时，你会产生较多的线粒体。
When you exercise mercy, you are set free.
当你流露出你的怜悯，你就会经历释放。
Tips: When you exercise, your body needs more oxygen, so you breathe faster.
小提示：当你运动的时候，你的身体需要更多的氧气，因此你会呼吸得更快。
When you exercise, you breathe more deeply and get more oxygen into your lungs with each breath.
你在运动的时候，做了更多的深呼吸，每次呼吸吸入肺部的氧气都会更多。
When you exercise, endorphins are released which make you feel more chirpy and also reduce the pangs for food.
当你运动时，一种叫脑内啡的物质被释放，让你感觉特别有活力，同时能降低你的食欲。
When you exercise your critical thinking, you give yourself the opportunity to correct false beliefs and thus refine your learning.
在你锻炼批判思维时，你就有机会纠正错误观点，进而优化学习效果。
When you exercise little, the aging process of your body will accelerate, and you are vulnerable to physical and psychological problems.
你的活动量很小，机体老化的过程就越快，你就越容易面临生理和心理方面的种种问题。
When you exercise, your brain releases chemicals called endorphins. This chemical makes you feel happier. That is just one more reason why exercise is good for you.
当你运动的时候，你的大脑会分泌一种叫脑内啡的化学物质，这种化学物质会让人感到愉快，这是为什么运动对人有益的另一原因。
When you exercise, your brain releases chemicals called endorphins. This chemical makes you feel happier. That is just one more reason why exercise is good for you.
当你运动的时候，你的大脑会分泌一种叫脑内啡的化学物质，这种化学物质会让人感到愉快，这是为什么运动对人有益的另一原因。
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