How do I get the abs and behind of Jessica Biel or pre-baby Jessica Alba? ?

Targeting the abdominal muscles after pregnancy is rambling due to the the stretching. You are doing the becomingly thing by doing both cardio and conditioning.

I suggest go for it core exercises such equally platform and using the balance ball.

Don't over exercise. Trying mixing up the cardio. Alternate between jogging, cycling and the elliptical. Also try interval training.