If you eat very little AND excersise, will you gain muscle? or lose muscle?!

You would lose muscle. You're not giving your body enough energy to survive so there certainly won't be enough to build muscle mass

A diet that low in calories results in muscle tissue being burned for energy instead of body fat.
The body thinks it is in a famine and holds on to any fat reserves.
Over an extended period of time the body fat will be burned but only after the loss of substantial muscle tissue.
Most of the internal organs, brain, and digestive system would suffer damage due to the low intake of nutrients nad excessive energy consumption.

If someone eats just 500 calories a day for long enough they will die. It's that simple - that's far too few calories to sustain anyone, whether they exercise or not.

Exercise requires calories to provide energy. Also, in turn, exercise (of the right sort) stimulates muscle growth BUT muscle growth can only occur if the diet provides sufficient calories and quality of food from which the muscle can be built.

A grown up person, for example, needs something like 2000-2500 calories per day. Roughly. It depends upon individual physique, activity-level, metabolism, etc.

You need to find a HEALTHY balance of a good, healthy varied diet of sufficient calories AND reasonable exercise, if you wish to be fit and healthy.

While many dieters are so focused on losing weight that they fail to stop and consider the source of that weight loss. Drawing a distinction between healthy and unhealthy weight loss is important for achieving long-term sustainable health. When losing weight, pounds are either subtracted from the body's reserve of fat mass or from lean mass. Catabolic weight loss refers to the latter--an unwanted subtraction in the body's store of muscle tissue.

http://www.ehow.com/about_5690640_catabo…

u need to eat more i think to gain muscle... all the muscles u do get are from doing all the strength workouts and you need fat and weight on you to gain these muscles. if you ate less, then you will lose the weight, which then means u will lose the muscles... so its the opposite to gain them, put weight on, do more workouts, and then u gain the muscles

I am no expert, but my theory is that it would depend on what type of exercise was involved.

I would think that cardio would result in muscle loss, and weight training could perhaps result in muscle gain or stabilization.

I could be wrong.

Lose muscle bro.

To keep muscle mass you need to be working those muscles close to capacity at least once a week and get a lot of protein.

You'll die!!!!!!