Yes testosterone is the main Protein used to build muscle mass. however muscle can still be gained in its absence.
NO! your muscle does not turn into fat it just replaces it as you work out. the toning and mass of your muscle will decrease though witch will make your muscle "shrink" even if you dont work out extensivly you still need to do some kind of physical activity to maintain the muscle you have gained.
Most likely due to the loss of muscle mass.
yes as long as your muscle mass does not change.
Protein or weight gain shakes.
Firstly, it will depend on how long you have actually been training for, usually you will find you can get away with 2 to 3 weeks without any real training but then you will probably start to notice a difference. Perhaps you could do something else whilst your resting, a sport that's physically demanding, swimming, which exercises every muscle in the body, or Cycling..running etc.
It's likely because you're building muscle mass, which adds weight. This is not a bad thing. Muscle weighs more than fat, but you'll look better. Muscle mass also helps burn calories.
You lose fat but gain muscle mass.
it increases muscle mass and muscle tone and the cardiovacular system
Athletes can safely add muscle tissue by working out and eating right. Weight training is often used by athletes to increase muscle mass.
The difference between muscle mass and muscle hypertrophy is that muscle hypertrophy is the increase in size of skeletal muscle while muscle mass is the weight of your body muscle.
Greater muscle mass and less fat.