I turn 50 in August - was a gym rat in my late 20's to mid 30's. Made a comeback to gym in December 2010 - I have been careful to slowly increase weights, in small increments, high reps (aiming for max 10, min 8). Now on split routines. Recently developed what I think is sciatica - weird as it sounds, it seems to coincide with adding crunches to workout? Didn't feel a twinge even when worked up to 100KG deadlifts (10 reps) & when my leg routine included squats. Should I just lay off deadlifts & squats or is the hip flexor action from crunches contributing? Is rest the go or seek physio?