Obviously not suitable, you can't drink plenty of water during strenuous exercise, which will increase the burden on your heart. It is more appropriate to drink water before or after exercise.

Diet is mainly to control the intake of fat, a lot of green vegetables, and foods rich in protein. I think it's convenient to have nutritional supplements now. Drink whey protein after practice and eat more vegetables at home. If you don't like whey protein, eat more beef, fish, milk and eggs. Pay attention to a reasonable diet and don't overdo it. After all, the food at home is very good now, and most people will not lack nutrition. Sticking to training and ensuring rest is king.