How To Make fast-twitch muscle fibers Bigger/More

Question

I do sprinting and watched this thing and i need to make more fast-twitch muscle fibers or make them bigger.

Any Exercises that will increase them?

Answer 1

sprinting! try doing 3 sets of 40 yard dashes, 8-10 reps, 2 to 3 times a week. Not only is this a good excercise to make you faster, but it also burns fat fast.

Answer 2

anal probe squeezes