The first lady tells People magazine in an interview hitting newsstands Friday, her birthday, that women should be free to do whatever they need to do to feel good.
Mrs Obama adds that she doesnt imagine resorting to plastic surgery or Botox but that shes also learned to never say never.
The first lady has never missed a health checkup, including a mammogram or Pap smear, and has had a colonoscopy.
As for diet and exercise, Mrs Obama says she doesnt obsess about what she eats but makes sure to include fruit and vegetables.
Her workouts have evolved to include things like yoga. Im seeing myself shift from weight-bearing stuff even though that continues to be important and the heavy cardio and running, to things like yoga that will keep me flexible, said Michelle.
The First Lady says her exercise target now is to maintain balance and flexibility.