Standing stationary for 30 minutes: Leg pain
Walking for 30 minutes: No leg pain
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Lactic acid build up. The muscles are still in use, but walking works the waste matter left over out of the muscle, whereas standing there doesn’t, and it just builds up between the cells. Plus there is also the reduced blood inflow not bringing as much fresh oxygen. All this conspires to cause cramping to get you to move and refresh the blood flow.
Static forces on your body continue to exert the pressure where they are. When you move you can change where the forces are.
Think of pushing on a balloon with a baseball. If it sits in one place at constant force the balloon will pop. If it is constantly moving over the surface it can’t stretch it to the breaking point.
Because your muscles are working, weight is being constantly redistributed.
The machinery is running.
But standing still, the machinery is stalling.
Your legs are secondary hearts.
Yes, I’m absolutely serious.
There are 1 way valves in your leg veins. Veins are the ones that carry blood back to your core, and eventually your (primary) heart. These valves only allow your blood to flow towards your core.
When you flex the big muscles in your legs, you end up compressing those veins. Because of the one-way valves, this pushes the blood in those veins against gravity, towards your core. When those muscles relax, those veins expand, and can be re-filled.
Those one way valves, combined with the flexibility of the veins, allows your large leg muscles to drive blood against gravity, back to your core.
So I’m totally serious. Your legs are secondary hearts, and flexing those big leg muscles pumps blood back to your core.
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