I have noticed something amazing latelly, and it will never cease to amaze me no matter how many times I see it........and that is " people never do what works". As a gym employee I see this all the time and continue to slap myself whenever I see someone training for speed and vertical leap power by doing leg extensions, lying leg curls, standing leg curls, donkey calf raises, 1 legged calf raises, seated calf raises, standing calf raises, machine hack squats, bench press, barbell curls, french press, 20 pound dumbell squats on a bosu ball, etc. They do everything but run and jump. My workouts are simple i swing 3 times per week, do pushups and pullups 3 times per week, and play basketball and soccer on occasion. nothing magical or mysterious about what i do yet, it works.