Crossover mountain climbers
Babyweight hip thrusts
Set an interval timer and perform each move for 30 seconds with a 10 second rest in between. 3-5 rounds with 1 minute rest (or a bit longer if you need it) between rounds.
(*Please note: I am not a certified personal trainer, and this workout was not designed by a certified professional. Always check with your doctor before exercising, especially if you've recently giving birth)