I have a client who is 125 lbs with 25% body fat, she is toned and lean except for her mid section. We do Pilates ab series and other Pilates excercises, ab machines, crunches, full sit ups with weights, and we’ve gotten into hoola hooping, still this is where most of her problem area is. Are there any different things we can do? Or some dietary change that may help?
As David asked I would like to know more about her cardio: Is she doing an easy 30 minute steady state routine? I would suggest she make at least two of those days interval training, have her go for a shorter period of time, but make sure she gets some high intensity intervals. You might also want to check her sleep status; as with high stress, lack of sleep can interfere with her hormones, and cause increased abdominal fat storage.