Lying Leg Curls
Technique Summary
Lay facedown on the leg curl machine. Curl the weight up with your ankles. Exhale on the way up. Inhale on the way down.
Exercises 
Hamstrings
Hamstrings
Hamstrings
Good Mornings
Technique Summary
Position the barbell on your neck/shoulders. Take an overhand grip of the bar. With your toes pointing out and feet shoulder width apart, bring your torso forward and down. Move your hips back to keep balance. Inhale on the way down. Exhale on the way up.