Running again!

First run back after a week off with a back problem. Easy 8km. Ran down to Hickson Road and joined Ray, Tim, Peter, Richard and Phil Dove for intervals. I just strided 4 of them without putting too much effort in. Plenty of stretching before and after - particularly of the hip flexors which appears to be the root of my back problem. Back felt stiff towards the end but not painful as it has been.