The reverse crunch has made a massive return to my programming over the last year. What I love about this movement is that we get lower abs and sacral counter nutation better than any movement I've used. But what I found is that this move is a gradual progression over four steps-
1. Back supported 90/90 breathing
2. Wall supported egg roll
3. Unsupported egg roll
4. Reverse crunch
The key is to inhale if you go backwards and exhale on the way down. Work on lowering slowly to control the transition between spinal flexion to extension. I also love to perform reverse crunch holds at the top for several breaths (see video 5) Give this a go and post thoughts below!