Natural Glute Ham Raise

How to do it

Using the leg pad of a lat pulldown machine or a preacher bench, position yourself so that your ankles are under the pads, knees on the seat, and you are facing away from the machine. You should be upright and maintaining good posture.
This will be your starting position. Lower yourself under control until your knees are almost completely straight.
Remaining in control, raise yourself back up to the starting position.
If you are unable to complete a rep, use a band, a partner, or push off of a box to aid in completing a repetition.

What muscles does the Natural Glute Ham Raise work?: Mainly the hamstrings, with help from the calves, glutes, lower back.
What equipment do I need?: Nothing but your bodyweight.
Is it good for beginners?: It is rated intermediate level.
How do I track progress on it?: Log each set and beat the weight or reps from last time. Liftrung shows your last set beside the next one and estimates your one-rep max from your sets.

Exercise descriptions: free-exercise-db, public domain.