7. Average number of steps taken for the average, non-sportive, person. 10 years of walking = 25,550,000 steps 20 years of walking = 51,100,000 steps 30 years of walking = 76,650,000 steps 40 years of walking = 102,200,000 steps 50 years of walking = 127,750,000 steps 60 years of walking = 153,300,000 steps 70 years of walking = 178,850,000 steps
10. There are 2 main phasesof walking. Non-weight bearing No-Contact Swing Phase (no weight on the foot) Weight-bearing Contact Phase (weight on the foot)
11. Non-Contact Phase Foot has just left the ground and is advancing forward until the heel is about to touch the ground again. No weight on the foot from the body above.
12. Contact Phase Foot/heel makes contact with the weightbearing surface below. 4 to 8 times the weight of the body is passing through the foot. 3 main parts to this phase of walking
14. There are complex motions of the foot that are essential for an optimum functioning foot.
15. These motions result in a locking and unlocking of the joints within the foot. Pronation and Supination
16. The amount of pronation & supination is very important as there are specific periods during the walking cycle when the foot should be supinated and other times when it needs to be pronated.
17. Supination - Pronation Opposite movements between the ankle bone and the foot. Think of it as a winding and unwinding of the foot mechanism. A period of stability and less stability of the foot structures while walking.
19. There are so many different individual instruments or components working with and against each other for the end result of a dynamic unified effort.
20. What is supination? Ankle bone (talus) Foot angles inward This is an over-supinated foot.
21. This is pronation. Talus goes this way Foot angles out-ward This is a severely pronated foot.
22. During pronation the foot is a Mobile Adapter This is a very important aspect of the foot to allow slight accommodation to an uneven weightbearing surface below the foot. During this time there is a normal amount of adaptation that is acceptable and built into the mechanics of the foot.
23. What is the normal amount of motion ? Pronation should only have a few degrees. Supination should be twice the amount of pronation.
38. But that is just what is happening on the bottom of our foot.
39. Just imaging what is happening above the bottom of our foot- a lot of very important things.
40. When the individual parts are working/functioning in harmony walking is easy, however, if there is a prolonged period of pronation, symptoms will occur. It is just a matter of time.