Walk as nature intended
Much of the 'wearing out' of hips and knees in western society comes from walking in shoes with built up cushioned heels and from a different style of walking and running. This product of 'civilisation' is the cool urban style of a long stride with a heel strike, straight leg and a roll from heel to toe using a rigid foot. This is encouraged by wearing trainers with high cushioning and stacked heels. There is a high risk of 'overstriding' and joint stress.
So in summary: there are two ways that people walk that are quite different; to walk with a heel strike, or with a midfoot/ forefoot placement. I advise heels strikers to consider changing their walking pattern to protect their hips, knees and ankles.
I advise you learn how to walk with a mid foot/ forefoot strike.
Step 1 – How are YOU walking?
The heel strike: Heel striking means taking a deliberately longish stride, placing the heel down first, quite a long distance from the big toe of the rear foot, keeping the leg fairly rigid, and then rocking forward on the foot to go forwards. The thigh muscles are doing most of the work. This is rather like a goose step approach to marching. The head and trunk tend to tilt forward as the weight rolls from heel to toe.
Midfoot/ forefoot strike: this means a consistently more upright stance. Instead of swinging a heel forward with a straight leg, the knee lifts and the foot is placed more under the Centre of Mass ie the stacked trunk, abdomen and pelvis. Typically, the footstep is much lighter, the cadence is higher [more steps per minute] and the time the foot spends on the floor is less. The posture tends to be more consistently upright.
Step 2 - Look at the video of walking with a midfoot/forefoot strike
Step 3 – Practising
Overall: A natural walk is more like a pony trot. The front of the foot is placed down a few inches in front of the rear foot and to get the motion most of the work is done by hip flexors and buttocks. You can check this by feeling the buttock on the side of the rear leg. Instead of a goose step think of one of those cartoons where the legs are drawn cycling underneath the body in a circular fashion. The stride length is shorter but it is mechanically more bio-efficient.
An important preparation is to tighten the abs and bring the pelvis forward and chest up.As you place your leading foot on the ground the weight is taken by the big toe and big toe joint, by the little toe and the outside of the foot [the fifth metatarsal if you want the technical term]. At this point you are stable on the front foot, your back heel is raised and you are conscious of the activity of your big and little toes.
A further point to emphasize is to point your big toe in the direction of travel parallel to the midline. To check that you are doing this correctly actually think about the little toe and check that that is also pointing forward. This facilitates the movement of pronation, flattening of the plantar fascia and use of the whole foot for takeoff.
A simple exercise: 'The 100 up' is a Stepping & Posture exercise that gets your started and progressing.
https://www.youtube.com/watch?v=r1EBrxUCiGs
Then progress to faster.
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