I have been "investing" some small amounts of cash into my "home gym" -- I mostly do bodyweight exercises - but have got some small pieces of equipment to try to keep up a bit of interest and motivation. When I was younger I could do lots of pushups - but these days they seem to hurt my hands, so I bought for a few dollars these custom-product.com/upload/2... The pushups are still tough - but at least I no longer have any pain in the hands problem
Anyway - I found this hundredpushups.com/ It looks like the pushups version of C25K !! 6 weeks to get to 100 pushups !!! - who is in with me???