A repetitive movement using muscles will strengthen them. However, the key to building muscle more rapidly is to exercise against resistance to the motion. So, if you used elastic bands behind your back and held in your hands while 'Air boxing', the results would be better.
Isometric exercise is performed without using any equipment. In this case you use opposing muscles in your body to "strain against" and provide the resistance that is beneficial to the exercise.
Very little. There is no resistance to exercise the muscle.
It will come slowly as you build muscle on the rest of your body. It will come slowly as you build muscle on the rest of your body.
This is very powerful muscle that lies behind your arm. This is very important muscle for boxing champion.
muscle
It takes quite a while to build muscle from walking, but it takes only a short time to build good strong leg muscle from jogging or running.
The pectoral (chest) muscles as well as the triceps muscle/
Weight training is the best way to build extra muscle and body size.
Your tongue, as it is already the strongest muscle in your body.
They don't help build muscle, but they do increase your intake of protien which is what your body needs to build muscle.
Yes
no
yea they do