After both of my babies my first challenge has been push-ups. I give myself a couple of weeks of recovery but then I get antsy to rebuild. For 1 month I do 30 push-ups a day. These start in my knees and with lots of breaks, but as my core comes back together and my strength rebuilds I get back to a solid 50 push-ups on my toes by the end of that month.
During that month I am rebuilding my core, strengthening my arms, back, chest, shoulders, etc. It is a month with a doable challenge that I know my body needs.
So for the workout today I challenge you to see how many push-ups (solid, strong push-ups) you can do. Do them at whatever level you need but see how many you can fit into one day.