shēntǐ lèi shì xūyào shuìjiào xiūxi chīfàn xīn lèi shì juéde bèi shìqing xiāohào

身体累是需要睡觉、休息、吃饭；心累是觉得被事情消耗。

Physical fatigue means needing sleep, rest, and food, while mental fatigue is feeling drained by things.