Ask HN: Purposely-inefficient daily tasks to keep in shape?

I started parking as far as I could from the building in college so I'd have to walk more. Park at the far end of a parking lot. Don't get deliveres, go to a store.

Take up woodworking with hand tools. Sawing your lumber, then planing it, should improve your upper body strength as well as your hand/eye coordination.

Strength-related... take 1 or 2 big cloth bags to the supermarket, fill them up with groceries, and carry them home on your hands instead of using a shopping cart and your car.

Wear a heavy backpack.