The subject of a sentence is the person, place, thing, or idea that is doing or being something. You can find the subject of a sentence if you can find the verb. Ask the question, "Who or what 'verbs' or 'verbed'?" and the answer to that question is the subject.
umm brobaly control your eating diet, start going for walks or runs a couple times a week, maybe make yourself gluten free, and my mom is trying to lose weight and she is doing a weight loss thing and working out