My son is now two and I have been trying to lose weight since I have had my baby. During my pregnancy I gain around 65 pounds; my pre-pregnancy weight was 135. Right now I am 160 and still trying my best t get to at least 140 but it's so hard. As for my tummy, while it's not saggy, it's not as firm as it was before I had my son. Are there any tips that I can follow as it relates to changing my excercise regimen (I do at least 3 times a week: 20 minutes on the stair climber, 20 minutes on the tredmill, and at least 30 miuntes weight training and abdominal work) and diet.I also had a c-section