Apparently, there's an air drumming work out that's taking Los Angeles by storm.
No, that is not an Onion headline, it's a real thing and it's called Pound Fit (or Pound in case you really want to take your hipster elitism to the next level).
Pound is self-described as "the world's first cardio jam session inspired by the infectious, energizing, and sweat-dripping fun of playing the drums."
While trying to find out more about this "phenomenon" we came upon an article from Huffington Post which provides a first-hand account of Pound:
The mere idea of constant drumming with weighted drumsticks was making my arms and shoulders preemptively ache before class, but POUND turned out to be less challenging than I was imagining. The lunges, squats and abdominal twists were all certainly trying — and I was sweating significantly — but I never really felt tired.
Which is probably the experience of anyone who takes the time to really think about what they're doing.