Attach 25-lb sled to waist with belt and hold 15-lb dumbbell in each hand
Step forward into lunge position with forward lean
Keeping front knee behind toes, lower until back knee almost touches ground
Raise to standing position; repeat with opposite leg in continuous walking fashion
Cover 20 yards
Rest 30 seconds; perform again
Coaching Points: Keep your hips square, chest up and maintain a slight forward lean. You want to squeeze your belly button to your spine and avoid letting your knee come over the tip of your toe in the lunge position.