I don't know, why would that cause problems? I'm only just starting rung 15 today. I'm actually not sure what that 'bending' exercise is for, or why adding a bounce would make it more difficult.
A few sources are short on citations, but basically say "don't bounce, you'll hurt yourself": http://web.mit.edu/tkd/stretch/stretching_4.html#SEC29 http://www.arthritisselfmanagement.com/health/exercise-and-physical-therapy/stretching/?page=print
The AAOS also says "don't do it": http://orthoinfo.aaos.org/topic.cfm?topic=A00310
I'd guess the first-ladder bending exercise is meant to stretch your hamstrings, mid/lower back, and abs, as well as serving as a gentle warmup. Adding a "bounce" would ostensibly further stretch t...
This is the public group instrumental rationality diary for May 1-15.
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