You need protein 1.5-2g /kg weight every day. If it is 70kg, you need 100- 150g protein. When these protein are converted into meat, it is about 1 kg to 1.5 kg, so the coach tells you that the amount of meat you eat is normal. If you can't eat these, the effect will be poor.

Second, if you lose weight and get in shape:

Low GI carbohydrate. Supplementing high GI carbohydrates immediately after exercise, bananas are good. Chicken breasts are all frozen and can be eaten. Just don't touch live birds. And coarse grains, such as corn and sweet potatoes. ...

I hope it helps you!