More Power Leaks: Part 3
The common areas for leaks are:
great toe dorsiflexion
mm strength test
loss of ankle rocker
loss of knee flexion/extension
loss of hip extension
loss of balance/ proprioception
let’s take a look at a video of the next 2, with Dr Ivo and his partner in SCR, Dr John Asthalter:
Power leak 2: Muscle strength test
you need adequate strength in both the short and long extensors of the toes, for arch integrity, the windlass mechanism as well as appropriate ankle rocker
Common compensations include:
externally rotating the foot and coming off the inside of the great toe. this often causes a callus at the medial aspect of the toe. This places the foot in more pronation (plantar flexion, eversion and abduction) so it is a poorer lever.
lifting the foot (and bending the knee) excessively (knee flexion > 60 degrees) to create clearance of the toes for swing phase. This is sometimes referred to as a steppage gait.
hiking of the hip, again to create clearance for the foot
Power leak 3: ankle rocker
ankle rocker is needed to move the body mass forward in the gravitational plane. It is one of the 3 rockers (for a rocker review, click here).
Compensations for loss of ankle rocker can include:
premature heel rise
shortened step length
excessive pronation through the mid foot
external rotation of the lower extremity and “rolling off” the inside of the great toe
forefoot strike gait
Ivo and Shawn. Giving you the information you need to make informed clinical decisions and build better runners, wherever you go! Spread the word of gait literacy!