DDR didn’t teach me to work myself into oblivion, propelled by shame and chalky smoothies. DDR taught me to get some water, sit down, talk to a friend, send a text, lean on that rail. For DDR, exercise wasn’t some frantic tailspin toward some punishing end.

Technologies have politics and games have aesthetics, but neither of these factors are immutable; there might still be time to rewrite the purpose of the iPhone’s accelerometer and motion co-processor.