Ok so I did this 10,000 push ups in a month challenge. It was hard. About tapped out first week due to my elbow surgery metal bits feeling inflamed, but 2400mg of ibuprofen and that settled down and I soldiered on.
Most OCD thing I’ll likely ever do, but it’s done. Apparently there’s a patch I can send off for. Not sure where I’d put it.
Go do something silly and challenging just because. 
Cheers!