As someone who spent a year exploring barefoot running, it was difficult for me to accept the idea that an insole could strengthen my feet. While I still think that walking and running barefoot is one of the best things you can do for your alignment and core strength, I do wear shoes most of the time I’m outdoors.
More than you probably realize, the way you find support from the ground has a lot to do with how easy or difficult it is to engage your core. Many of us were born with a foot structure that tends to promote instability and misalignments due to a congenital twist in the talus. This tends to promote a lack of contact between the big toe and the ground and less support through the midline of the body. If you do have “Morton’s foot structure” or “Rothbart’s foot structure” you’re in good company. In Botticelli’s painting of Primavera, Mercury and Charity have this foot design and you can see what it’s doing to the alignment in their knees. Unfortunately most of us are not gods, and are more prone to problems with our feet, knees or low back due to this misalignment.
The way that Posture Dynamic insole work is to provide a minimal lift to the ball of the big toe (we’re talking millimeters here) that allows the medial arch to engage sooner in the gait cycle. This subtle shift helps to align the foot and consequently the leg and pelvis. Because it’s not an orthotic it isn’t designed to support the foot, but instead strengthen it and bring it back into alignment by changing the timing of when you feel the ground through your big toe. A wacky concept, but it seems to work.
Anyway, here’s a link to Posture Dynamics. If you’re unsure about whether these insoles are right for you, I can do an assessment next time you come in. It takes about 5 minutes.