When you excercise, workout or whatever an acid is produced that basically damages your muscles. When your muscles try to recover from this they become larger from the scar tissue formed by the healing process this also explains the pain experienced the day after.
exercise builds muscles by adding an additional weight.
Its exercise that involves moving your body to build muscle strength.
Very little. There is no resistance to exercise the muscle.
The only way to build muscle is with exercise. That being the case, since exercise requires calories, building muscle will also burn off fat.
Any abdominal toning exercise will help you build muscle. To build more defined muscles, you need to add weights to your exercise. This could mean using a weight machine, using free-weights, or using ankle weights.
Lunges. see: http://en.wikipedia.org/wiki/Lunge_(exercise)
Eat well and exercise.
Any diet that you go on to gain muscle should include a lot of protein. Protein will help build and repair muscles after you work out. P90x is a good workout plan to build muscle.
Exercise helps build heart muscle, or myocardium. A healthy heart is one that gets moderate exercise at least a few times a week.
No you do not. Water is used to refill the water supply in your body when you sweat while exercising. To build muscle, you eat foods with potassium like bananas or potatoes. That doesn't build you muscle, but it helps make you less tired when you exercise.
The same way as for any other age group . By exercise and diet.
You will not get muscle without a proper diet, and exercise program. You will need to eat more proteins to build muscle fast. You can buy a testosterone boosting steroid from body building.com
Eating tuna helps to gain muscle because tuna is protein and protein builds muscle. However, to build muscle you need to exercise as well.