5.samadhi wrote:So your feet are on to generate the force for the concentric portion of the movement (the initial lunge) and footless (or sometimes tapping the wall?) for the eccentric portion (catching the hold)?
Without video it's hard to know for sure what my feet are doing at all times, but I sort of think my toe is touching/tapping the wall in both the initial launch and in the catching of the next hold -- (and maybe in between too?). Not sure which foot I use.
Although my home gym does have a couple of foot-jib holds on the bottom vertical section, I normally don't use those -- just have some toes of one foot touching the blank section of the wall. At my home gym I do campusing workout in bare feet, so tapping a plastic jib is mildly painful.
So I don't think having my toes touching adds much
upward force to the Launch phase. It does make it easier to start from a different body position. It likely changes the inward/outward force through my fingers in the Launch phase.
I'm pretty sure it makes the Catch phase significantly easier, because the forces/torques through the fingers are more stable directionally.
So for my training purposes this stability means I am able to attempt bigger moves (skipping rungs) or on smaller thinner rungs.
Ken
P.S. Eccentric / Concentric ? My understanding of the physics/biomechanics is that the Launch phase is a concentric contraction for the arm muscles, but for the finger/forearm muscles the Launch phase is eccentric.