Stand with feet hip-width apart, holding a dumbbell in each hand in front of your thighs with palms facing you.
Keeping your legs nearly straight (slight bend in the knees) and your back flat, hinge at the hips to lower the dumbbells along your legs toward the floor.
Lower until you feel a deep stretch in the hamstrings, keeping the dumbbells close to your body.
Drive your hips forward to return to a standing position and repeat.