For flabby tummy, it is always to my general knowledge that after you lose belly fat you need to firmed it up.  But can the firming of skin done thru exercises?  Well, it can but the result is very minimal only.  Usually exercises is to burn to fats but they never work as firming the flabby skin.  Massaging firming lotion come in handy in this case.  Just so you know, there are always a time for pampering after you work like pig.