Establishing a stable foundation is the key to owning the exercise. "Keep your feet hip-width apart, heels down [in the starting position], your shoulders level, and your core braced as if you're about to be punched in the gut," says Jack.
"Push them back as you dip down in preparation to thrust the dumbbell upward," says Jack. "That will allow you to generate more power." So will squeezing your glutes during the second part of the movement—the snatch.
As you thrust the dumbbell upward, keep it as close to your body as possible. "That's easier on your shoulder and more powerful than swinging it in an arc," says Jack. It will also help you maintain your balance and efficiently handle your weight.
Punch the weight directly above your shoulder as you drop under it. "Don't press it up—it's all about momentum," says Jack. "And as you lock your elbow at the top of the move, keep your biceps close to your ear to reduce the stress on your shoulder."