What’s the pulmonary equivalent of dry heaves? Whatever it is, my diaphragm has been doing it irregularly all damn day. Feels a bit like doing sit-ups; if this keeps up, who knows, I may find myself with washboard abs.
A minor character in Neal Stephenson’s The Diamond Age has implants that randomly twitch his muscles, so that they never stop exercising. I wonder whether such ‘passive exercise’ is technically possible today.