Lifting light weights to get strong is like riding slow to get faster. Inefficient.

I have used a power lifting program, developed by the worlds strongest drug free man.

You use a real slow warm up, and then do six sets of four reps with about 80 % of your max lift.

Caution squats can destroy you. Very quickly. The spotters lift the weight off you after you have been injured.

Do leg presses. Muscles do not slow you down, they move you. The give you all of your motion. Gravity will not stand you back up.

Do two months of weight work in the off season, and you will be stronger and faster. Eat a little more protien, and, if you are very lucky, you may gain a pound in each leg. Get a PT, and let them show you the correct way.

The strength leaves about the same speed as it comes. That is why NFL teams lift all season. If not, the players will be at their weakest at the most important time.

You will never have tree trunk legs.