Plank knee ins are an excellent basketball drill to increase your vertical leap. Start in the push-up position and bring one of your knees up towards your chest, keeping it close to the ground. Then, extend the leg back and hold for 30 seconds. Be sure to switch legs when the 30 seconds is up and repeat the set until you reach fatigued muscles. You’ll feel the effects of this basketball drill almost immediately; before long, you’ll be leaping higher than ever before.