If the ankle won't bend far enough, the body finds the range somewhere else — usually by tipping the torso forward. You feel it in the low back. The restriction is at the ankle.

Driving doesn't feel like physical work, which is why the damage goes unnoticed. Shortened hip flexors, constant vibration, and one leg working asymmetrically for the whole drive.

Hours static in a vehicle, then everything at once. It's the same problem as a player sent in cold — and it's why two-thirds of officers report chronic low back pain.

The elbow gets blamed more often than it deserves. When the shoulder isn't doing its share of the overhead work, the elbow absorbs what's left — which is why treating only the elbow doesn't hold.

Everyone has a side they carry on. After enough months, the body stops treating that as temporary and starts treating it as normal — and the pain shows up long after the pattern is set.

The volume of walking alone is significant, and it's on hard surfaces in work footwear. A satchel on one shoulder loads the body asymmetrically for hours. The repeated step up and down out of a vehicle is a high-frequency movement most people never think of as loading — and delivery routes have gotten denser, not lighter.

Nursing has one of the highest injury rates of any occupation, and the low back takes most of it. Patient handling causes it, and why twelve-hour shifts make it stick.