HOW: In a squat rack, place a band on each end with a weight attached at the bottom of the band. Make sure the band tension and weights are even. Place the middle of the bar in the front of your shoulders with your elbows bent underneath holding onto it. In a standing position place one foot in front of the aligning the heel of one foot with the toes of the other one, press the bar overhead with both arms. The slower you go the easier it will be. If you press faster the bands will move the weight more.
FEEL: You should feel your shoulder muscles working.
COMPENSATION: Make sure you press the bar straight up overhead.