What if we could stay young forever? Peter Bowes continues his quest to find out what science and lifestyle can do to help keep mind and body young. Is it possible to slow down or even reverse the aging process, through exercise?

The latest trend in gyms is towards high intensity workouts. Some scientists say they're better for the body than less strenuous exercise like jogging - and just a couple of minutes a day could be all we need. And what if we could inject ourselves with hormones, to stay young?

(Image: Woman running on treadmill in gym. Credit: Science Photo Library)