The foot can be likened to the spark that initiates the kinetic chain. Upon impact with the ground the foot should be able to convert forward momentum to a lateral, and rotational force up through the knee and into the hip to load the glute and facilitate receptors to propel the body.
When the foot sparks the kinetic chain with too much or too little, lateral and rotational forces then we begin to see dysfunction up the kinetic chain. These common issues can often be the overlooked villain behind accelerated knee, hip, and lumbar spine degeneration.
As promised in the title are 14 flavors of foot dysfunction with basic definitions
- Rearfoot varus – Heel bone inverted
- Rearfoot valgus – Heel bone everted (rare)
- Tibial Varum – bowing out of tibia (loads inside of knee greater)
- Forefoot Varus – Inside of forefoot twisted down relative to outside (most common)
- Forefoot Supinatus – Same as above but driven by soft tissue
- Forefoot Valgus – Inside of forefoot twisted up relative to outside
- Plantarflexed 1st Ray – Big toe series of bones through the foot are pushed down
- Ankle Equinus – Foot points down relative to ankle
- Forefoot Equinus – Forefoot points down relative to midfoot
- Hallux Limitus – Big toe doesn’t lift up much
- Hallux Rigidus – Big toe lifts up even less
- Hallux Primus Elevatus – 1st Ray – Big toe series of bones through the foot are pushed up
- Hallux Abductovalgus – Big toe pushed laterally over other toes
- Metatarsus Adductus – Bones of the digits pushed in direction of big toe creating a ‘curved’ foot
Lots of minutia concerning the foot only to establish a point that foot type and performance is essential to efficiency in the kinetic chain!