I'm training for the Great North Run, the first time I've done it for 10 years! I was doing very well and got up to 7-8 miles comfortably. I've now hurt my foot - think I must have pulled a muscle while running, or twisted it slightly - and it's hurting too much to run. Any ideas of what I can do to keep up fitness but rest my foot while I recover? Can someone reassure me too that a week off won't put me back too much.