After pounding the treadmill for about 6 weeks I finally braved an outdoor run. It was only just over 3 miles with the kids on their bikes so it wasn't too taxing as I had to keep stopping to wait for them as it was a hilly route but it did give me some practise on hills and it was good to involve them in my new hobby although not sure if I would have been better letting them run/walk the route too as they struggled on the hills on their bikes (no avoiding hills where we live and the bikes won;t fit in the car)