Would you ever reach a weight plateau if you go on a high protein and low fat and low carb diet between 800 to 1000 calories daily without exercise and will you maintain muscle cells?

That is far better than ignoring the weight problem, but exercise will help speed the weight loss process and it will build/maintain muscle tone. Fat is burned in the muscles, it doesn't just disappear. Without good muscle tone you don't really have anywhere for the fat to go.

Answeryea, that makes sense. but is 800 calories too little? will it cause muscle loss instead? i'd think it's better to remain sedentary. at least then fat cells can be lost because of the high protein diet. besides i'd see it as a challenging thing to exercise during a 800 calorie, high protein, low carb diet. please enlighten me if I'm wrong!