Have anyone experience these? Some days when you’re working out
or involving in some sports, you feel weak and you can perform. But
some days you feel you have the strength and you’re able to lift
heavier weights, jump higher for sports. And also during lectures,
you’re so sleepy, your eyes are heavy, but suddenly something
happened like the lecturer shouted at other things not due to you
sleeping, you began to gain focus and not falling asleep anymore.
May I know what is the cause of this sudden increase in
strength/focus in our daily lives?
