Painful, paralysing and PB-unfriendly, cramps can strike at any time. "There's no one definitive cause," saysDr Steve Ingham, head of physiology at the English Institute of Sport (eis2win.co.uk). Research in the Muscle & Nerve Journal shows
solid to work towards. Then join either a running-specific rehab group or a yoga class and track your progress. "Note every time you hold a stretch a little longer, jog a little faster or manage a few more sessions a week," says Thompson. "Nothing
