Speed and power is entirely genetic. you're either fast or not. you can either jump high or you can't. you can improve it but only by slim margins.
Strength however, can be trained and improved greatly and well into middle age, which is why barbell training is so popular.
Speed and power is entirely genetic. you're either fast or not. you can either jump high or you can't. you can improve it but only by slim margins.
Strength however, can be trained and improved greatly and well into middle age, which is why barbell training is so popular.