Reverse Cranks build essential back lever strength and, ultimately, straight body pulling strength. Back levers, and the subsequent ability to maneuver in and out of the back lever position, are a core basic for strength development on the Xtreme Rings.
PROGRESSIONS:
1) Tuck reverse crank - Begin from an inverted pike hang as demonstrated in the photo below. From this position, begin bending your legs while extending outward a tuck back lever position. The back should be curled in this variation of back lever. During the back lever, you should feel as though the shoulders are pressing forward strongly, while the hips are pressing backward. The elbows must remain straight, however the choice of whether to use an under-grip or over-grip on the Xtreme Rings while in the back lever is a matter of personal preference.
Pause or not as you choose and then pull up; not back to the inverted pike, but up to a straight body inverted hang. Lower once more to the inverted pike hang to begin a new repetition.

2) Advanced tuck reverse crank - You will now perform both the tuck back lever and the pull out of it with a flat back. The addition of the flat back position will significantly increase the lower back strength component of this variation; not only in the back lever position itself but especially during the extension to that back lever.
3) Straddle reverse crank - From the inverted pike, extend outward into a straddle back lever. Of special note here is that the wider the legs are pulled apart in the straddle back lever, the easier the back lever position will be. Upon reaching full extension in the straddle back lever position, pull up to an inverted hang. Do not allow the back to curl during the pull upward, but struggle to maintain a flat position. During the pull to inverted hang, you should feel your hands pulling powerfully into your hips. Upon arrivng in the straight body inverted hang, lower once more to the piked inverted hand and then repeat for the desired number of repetitions.
4) Half lay reverse crank - From the inverted hang, begin by bending your knees 90 degrees while extending your hips and back outward into the back lever position. In the fully extended position of this back lever variation, your back and hips will be completely flat, but your knees will be bent with your feet pointing directly up at the ceiling. Pull up to the inverted straight body hang and then return once more to the inverted pike hang.
5) Reverse Crank - From the inverted pike, keeping the legs together and knees straight, extend out into a back lever position. Once more feel the shoulders pressing forward while pushing the rings backward. Do not merely attempt to hang in the back lever, but make this an active full body movement with the muscular tension being generated by the shoulders, hands and lower back all striving to extend simultaneously into their respective position. Pull out to a straight body inverted hang and then return once more to the inverted pike hang.
All of the above progressions may be performed either with or without a static hold in the back lever positions. Also do not hold your breath during the entire movement. I recommend holding the breath during the extension to back lever, exhaling during the pull to inverted hang and then inhaling during the return to inverted pike hang.
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Yours in Fitness,
Coach Sommer