She should try to eat a beneficial meal three times a day, and make sure to eat a light snack to recharge her biddy afterwards.
Menstruation? Idk if that is right, but it sounds like someone started their period.
Answer:
We should drink water while we exercise because when we exercise, we sweat out part of the water we have in our bodies. Water is important to our everyday life, and when we become tired and overheated, water helps us to cool down, and it also helps replace the water we lose from sweat.