Tip: Goblet and Hack Squat Superset

The key on the goblet squats is to elevate your heels and use a narrow stance to emphasize the quads. On the hack squats, do the opposite: use a high and wide stance. Don't come up all the way to ensure continuous tension. The weight is light but you'll do 6 rounds of this superset with 60 second rest breaks. The cumulative fatigue will begin to kick in by the third round!