Negative
 

Negative reps
Growth hormone is one of the most powerful hormones in the body. It has the ability to burn fat and slow down aging. In a recent study, scientists discovered that subjects doing a negative repetitions workout, managed to increase their growth hormone levels up to 40 times higher than their HGH levels before the workout. A negative reps workout requires that you load the bar with a weight that is about 10-20% heavier than your 1RM weight. With a help from a spotter slowly lower the weight, stretch at the bottom of the movement and get the weight back up