Place a barbell or two dumbbells on a rack at a position between your upper thigh and hip level. Do not start this exercise from the floor.

 

Flex your knees slightly and keep your shoulders and back in proper alignment.

 

Slowly bend at the waist while maintaining proper posture throughout the exercise.

 

Descend to the point at which you feel a deep stetch in your hamstrings.

 

Note: If you use dumbbells for this exercise, squat down to the weights while keeping your back in the proper posture and alignment; then grip the dumbbells and ascend upward using the strength of your legs, not your back. 

 

Repeat the exercise for the recommended number of sets and repetitions.