just moved on to week 3. First 2 weeks were on the treadmill and found it hard but did it. Tried to do wk3 on the road but really struggled and started to get pains down the side of my shins so unfortunately had to give up. I am a big bloke and find it easier on the treadmill. Enjoyed the outside world and wondered is there a good way to build it up so not stuck in the gym?