This quad-focused, plyometric lower-body workout is guaranteed to get your legs burning – and leave you gasping for breath … I know I was! SUPERSET Barbell Traveling Step Squat/Jump Squat SETS: 3 REPS: 12 narrow•12 shoulder-width•12 wide/30 seconds REST PERIODS: 30-45 seconds SUPERSET Leg Extensions/Jump-Up Squat SETS: 3 REPS: 20/15 REST PERIODS: 30-45 … SEE MORE