I'm still maintaining my pre-pregnancy work out routine (5 days a week) with a little bit of alterations. I was doing M-W-F strength training + 20 minutes of treadmill intervals & an hour of cardio on Tuesdays and Thursdays.. However, I've made changes to my cardio days because the high intensity leaves me light headed and dizzy. I do a more moderate intensity with higher incline instead, but my strength training hasn't changed any. I still lift heavy, but I'll switch it up some once my belly starts to get in the way.