How do you get muscular legs?

It can do. Assuming you do no running already it depends on a few things, namely: a) How muscular your legs already areb) What type of running you're going to do - eg. Long distance, sprinting,...

Pacsun, Buckle, and Hollister. Also, Target has some.

There are 3 types of muscle contraction in the leg extention and they are Concentric, Isometric, and Eccentric contractions.

you should be follow fatty food. Because through fatty food our legs goes to skinny position from strong position

Because the imense force of gravity on his massive frame. Basically he is doing a calf raise every time he takes a step.