Hamstring Leg Curl
Muscle Focus: Hamstrings 
Position: Place hands directly under shoulders with one knee kneeling. Extend one leg and put  the short loop (unless it does not fit), around the foot and raise leg hip height.
Spring attachment: Low
• Exhale, bend the knee toward 90 degrees with dropping or moving knee.
• Inhale, return to straight
• Keep pelvis neutral and still without over swaying the lower back with the movement
• Stabilize by pulling abdominals in firmly throughout to protect the back
• Keep head and neck neutral and shoulders back and down
• Repeat this motion 5-10x and then hold the stretch
Return to start and repeat as desired