Angry gym classes are booming, with activities including pummelling tyres with a sledgehammer. But they might not be as cathartic as they at first appear

Name: Rage workouts.

Age: Would this be a good time to invoke Aristotle’s beliefs on catharsis?

Appearance: Pumped-up, red-faced, veiny, on the brink of a disciplinary hearing.

Is this about being angry at the gym? Because, this morning there was a guy just sitting, using his phone, on the machine I needed … You’re close, but you’re not quite right. This isn’t about getting angry while you’re exercising, it’s about getting angry in order to exercise.