Hi I am about to start week 1 again having completed week 2 a year or more ago and then gave up due to back trouble. Before when i did it i got pain in my shins and was told by some people to run through the pain and others said rest? why would this have happened and how can i avoid this happening again? Could it be my trainers are not good enough do i need expensive trainers when starting out and if so where is best to get them? Any tips re trainers/pain gratefully received...also my 11 yr old who is fit and healthy wishes to do this with me is it suitable for kids?