Could This Be Your Best Medicine?

I’m a big fan of walking. Arizona is a great place to do it. There are hiking trails everywhere. And the climate most of the year really lends itself to being outside. We try to have our assisted living residents walk outside at least once a day.

There are good reasons to walk.

Research  at the University of Pittsburgh, analyzing nearly 35,000 people over 65, found quite an interesting correlation: your walking speed in many cases predicts how long you will live. A simple measurement requiring nothing but flat ground and a stopwatch reveals the integrated health of your entire body. People who walked faster lived longer, with the relationship holding consistently across all demographics.

Pushing yourself a bit while walking can have some big benefits. We’re not trying to set world records for walking speed. Just feeling a little tired after you’re done.

Your feet are engineering masterpieces. Each contains 26 bones, 33 joints, and over 100 tendons and ligaments arranged into an arch that functions like a bridge. This arch acts as a spring, storing elastic energy when compressed and returning it during pushoff, reducing the metabolic cost of walking by roughly 17%. Beneath this arch lies the plantar venous plexus—a dense network of veins that pumps blood upward with each step. Walking at a normal pace delivers 60 to 70 pump strokes per minute per foot, a hydraulic system activated only by movement.

Walking is controlled falling governed by inverted pendulum physics. Your body rises over your planted leg and converts potential energy to kinetic energy with 65% efficiency, meaning your muscles only need to supply 35% of the effort.

Meanwhile, your Achilles tendon stores and rebounds elastic energy, further reducing muscular demand. This extraordinary engineering explains why you can walk for hours but running exhausts you in minutes. Every system in your body was calibrated for exactly this type of sustained movement: your wide pelvis, angled femur, short toes, and rigid arched feet are all walking adaptations.

Your bones are piezoelectric. When mechanical force is applied during walking, the impact generates electrical signals that trigger osteoblasts (the cells responsible for bone formation) to build new bone density precisely where walking forces concentrate.

The bones actually remodel along lines of stress. But the most stunning discovery came from Kirk Erikson's research: one year of moderate walking three times weekly for 40 minutes reversed one to two years of hippocampal shrinkage. Walking triggered neurogenesis in the memory center of the brain. The study proved that the textbook doctrine of inevitable cognitive decline was wrong. Walking grows brain tissue.

Walking can really help dementia.

Modern life has removed something your body expects daily: sustained movement. For 99.5% of human history, daily walks of 5 to 10 miles were normal. Today, the average older adult walks 3,000 to 4,000 steps (1.5 to 2 miles).

Much of what we call aging—stiffness, heaviness, poor balance, fragmented sleep, cognitive fog—is actually deconditioning. The body isn't failing from time; it's failing from stillness.

Your prescription is simple: walk at a moderate pace where conversation feels comfortable, breathing is elevated but not strained, for 40 minutes three times weekly. That may be enough to reverse years of decline. We see improvement in our assisted living residents once we have them consistently walk.

Within days, fluid systems begin moving. Within weeks, cardiovascular fitness improves. Over months, bone density rebuilds and neurons grow. No gym, no equipment, no medication required. Only the decision to begin. Your body has been waiting for this input its entire evolutionary history.