Speiger

A type of sports exercise consisting of putting lift weights in a backpack and wearing it while running, that supposedly helps to strengthen your back. In reality, all it does is ruin your back and cause you immense pain and discomfort.

Richard: Hey man, do you know why Michael is walking so funny lately?
Bob: Yeah man, he's been doing the Speiger a lot and that kind of ruined his posture.
Richard: What an idiot.