I was advised after the first 6-8 weeks when all was well and no problems to add it. Jointed a women's circuit training club...Womens Exercise Express. it is a 40-45 in workout that changes weekly. I go there 6 days a week and do the circuit MWF then Tu TH S ride a recumbent bike for 30-40 min. The toning and flexibility I've gained since April shows. Think it helped with clothing sizes (Size 12) dropping very rapidly after starting to exercise...and ...I still continued to lose pounds. I started IP 1/10/13..exercise 4/7/13.Had lost almost 32 pounds by the time I began exercising, and hit my main goal of 65 pounds at the end of August. Sizes 0-2 now, or extra small petites .
Biggest thing is it is now incorporated in my life. This is something we all must do...or the good efforts in losing pounds will more than likely not be maximized or maintained. Plus the evidence is undeniable ..exercise is necessary.
It's part of my day as I head off soon to figure out how to lose maybe a few last pounds and KEEP it off!