Help! Can I get your votes on whether it is risky to run a half marathon on Sunday after 4 weeks off due to injury & now a cold? The injury (piriformis pain causing referred pain through the leg) is under control but I'm worried than I will have lost fitness and muscle condition and therefore risk causing secondary injuries. I've been in the gym but for only half of those 4 weeks due to the head cold. I've been running for 5 years doing on average 2 or 3 organized halves every year but this year I've been off more than on due to a variety of injuries. I've kind of accepted I shouldn't run but I'm flying over anyway and I fear on race day I'll get caught up in the atmos and what to run! What to do?!