Max's Mum: when i find the tennis ball (I have one somewhere) I'll use it. Meanwhile, I got my husband to massage the outside of the thigh yesterday evening, not too vigorously, and it's much better this morning. Actually I suspect that with this being an acute (short term) versus a chronic problem, too vigorous rolling might be the wrong treatment. I'll have a sports massage session next Monday if it's not better by then - but it's so much better already, that I'm hopeful I'll be back running by tomorrow.