[jl2718]

We always hear about the benefits, but never the etiology. One theory suggested here is insulin sensitivity of muscle mass. Here is another. Leg muscles help to pump blood to your brain. You can actually die from being suspended vertically in a harness with blood pooling in the legs and nothing to push against. Either way, I’d suspect that strengthening the legs captures the bulk of the effect.

[djhn]

So they need a control group of sedentary people who lie in bed all day or own one of those futuristic fully reclining workstations with displays and peripherals that tilt with you.