I was really worried as I haven't exercised for a number of years other than irregular walks. Nearly 63 and overweight so I was concerned about my stamina levels. It turned out to be a great first run. My daughter, daughter in law, and two young grandchildren joined me on the track to encourage me. Really pleased I managed all the 60 second spurts. A very cold night but we all enjoyed it. I just took it in my own stride.