I gave birth less than 3 weeks ago, unfortunately by C section but as a sports therapist i plan to resume running on the ok from my 6 week check up. When i say running i actually mean jogging and walking initially taking it very slowly. I managed to run whilst pregnant up to the 6 months point and then carried on swimming and using CV equipment for another couple of months. Take it gradually and definatley do some core stability and pelvic floor exercises. Do not expect to be anywhere near your pre-pregnancy fitness. Good Luck