Exercising increases muscle sizes by exerting pressure on these muscles (but not too much mind). As a response the muscle tenses to allow the increase of weight being lifted (relating to the arms) for example to allow the body to develop as an adaptation tool used by our earlier ancestors to survive.
yes
Increase
It could be the increase of muscle.
By using your muscle you are strengthening them so all you have to do is use them to increase the strength of the muscles increase the load.
It damages your muscle. Your body then use the protein from food to repair those muscle, and adapt the muscle to be ready for the next exercise. Resulting in the increase in size.
Muscle strength is most often increased through repeated use of the muscle or exercise. Muscle strength can also be increased with a combination of exercise and diet that includes protein.
True.
Hypertrophy.
Ab belts increase the chances of building muscle, but will not create muscle if used with out exercise.
hypertrophy
Existing muscle cells increase in diameter.
Exercise help you increase the quantities of Actin and Myosin as well as increase the size of your muscle