Not sure why they refer to a "virtual pivot" in the diagrams and text
when it is an actual physical pivot. Unnecessary jargon.
Hi,
I think this is an interesting development supported by a rather poor
paper - poor science and poor English. It might allow some
experiments to determine optimal stretcher angle and should help
people with stiff metatarsophalangeal joints but might give them
ballet dancer's toe injuries! It might adversely affect balance but
the shoes will not crack in the sole.
There is no research on what the stretcher angle should be except one
paper which found increasing the Concept 2 stretcher from 41 deg to 46
deg improved power output. Raising the feet also helps with stamina
on C2 2 k test. Nothing done in boats.
Has it been used in anger?