1、Relax, don't overtax yourself.

2、overtax one's vocal organs

3、To exert(oneself) too much; overtax.

4、Rest is what you need so that you do not overtax yourselves, and adequate sleep is most essential.

5、No matter how strong your willpower muscle becomes, it's important to always respect the fact that it is limited, and if you overtax it you will temporarily run out of steam.