In autumn, there is less sunlight. The body produces more melatonin (褪黑素). Melatonin is a hormone (激素) that tells our brain to sleep. So it’s natural to feel sleepy with less sunlight.

入秋后，日照时间变短，褪黑素分泌相对增加。而褪黑素能调节人体睡眠，所以很多人一到秋天就容易犯困啦~

When the temperature drops, our body loses more heat. So we eat more high-calorie food to keep warm. This makes our body release insulin (胰岛素), which lowers our blood sugar. This process can make people feel sleepy, too.

随着气温的下降，人们为了保暖会食用更多高热量食物。因此身体也会分泌更多胰岛素来降低血糖，这个过程也会让人觉得困倦。

Of course, at the beginning of the school year, you may also face more schoolwork and get up earlier. Your “autumn fatigue” may be proof (证据) of all your hard work!

当然，随着秋季学期开学，努力适应开学的节奏也可能是你“秋困”的原因~小伙伴们要注意劳逸结合哦~