Interestingly, the flow motion model shows that if a calcaneous cannot plantarflex the pelvis will struggle to tilt anteriorly.
This comes in a few scenarios:
A) the pelvis is posterior tilted and cannot anterior tilt
B) the pelvis is already anterior tilted and cannot anterior tilt MORE
C) the pelvis is neutral(ish) and struggles with movement at all in (at least) the Sagittal plane
Similarly the calcaneous could present so:
1) the calcaneous is dorsiflexed and cannot plantarflex – in a high arch cavus supinated foot type (for e.g)
2) the calcaneous is already plantarflexed and cannot plantarflex MORE (on the flat foot end of the spectrum)
3) the calcaneous is neutral(ish) and struggles with movement at all in (at least) the Sagittal plane
The possible combinations are numerous. For instance A) could partner with any of the three outcomes 1), 2) and 3). Likewise for B and C.
I like option C)/3) where the structure is neutral(ish) but struggles to move. Without observation of its movement potential this structure would be unconsciously applauded as doing well according to it’s textbook neutrality and is often a piece of the puzzle that is overlooked. If it cannot move you are buggered. Regardless of how good it looks! 🙂
The key to any and all of these relationships of course is movement. If we are able to restore plantarflexion in any of the calcaneus based scenario’s, (1, 2 or 3) we’ll naturally begin to create the potential for anterior tilt at the pelvis and simultaneously minimise the compensations and adaptations taking place in the body to cover the ass of the non-plantarflexing calcaneous…
Of course the non-plantarflexion is probably not what hurts but the adaptations to this non-plantarflexion most likely do create an environment for discomfort or pain to show up. It might be that getting the calcaneous to move properly reduces the adaptations enough to reduce compromised movement elsewhere in the system.
It’s a shame there is another two dimensions of movement to consider and all those other joints isn’t it..?
The Flow Motion Model is designed to highlight all of these individual, coupled and dynamic relationships that take place in motion through this amazing body of ours.
Happy hunting 🙂