Single Leg Squat

Minute 3: Sideways Shuffle (cardio)
Stand with feet shoulder-width apart. Step to the right with right foot, then quickly bring left foot to meet it. Repeat, picking up the pace as you shuffle sideways all the way across the room; return with left foot leading. Continue going back and forth for a full minute.

Minute 4: Single-Leg Squat (toning, pictured)
Stand with knees slightly bent, holding a five- to eight-pound dumbbell in each hand. Lift right heel slightly off floor so you’re standing on your left leg. Bend left knee, making sure it doesn't go past toes, as you sit back as far as you can comfortably. Hold for a count of three; return to starting  position. After 30 seconds, switch legs.

Minute 5: Football Drill (cardio)
Stand with feet shoulder-width apart. Run in place as fast as you can. Take periodic 10-second breaks to jog, if needed.