This is an important question because it can either result in preventing further injury or sidelining you for months. I always think back to my first running injury. I had a minor slip on the side of a trail and felt a sharp, sudden pain on the backside of my groin. Of course it happened the week that I was supposed to go out for a 35 mile race. I went out the next day for another maintenance run thinking that it was just a slight muscle pull and that maybe a lighter jog would help sort it out. Nope. Later that day, I couldn’t even lift up my leg to put my shorts on. I freaked, went to my PT and had her do all the needling and taping she could, but things just progressed even worse. I made the tough decision to bag my race, even though I had been training for it for months and I’m glad I did because an MRI confirmed that I indeed had suffered a pelvic stress fracture. If I had even attempted to run on it, it could’ve been A LOT worse. In the case of nagging injuries, it’s all about respecting the boundaries. Running is already meant to be uncomfortable sport, but further agitating pain, especially if it becomes debilitating isn’t worth the injury time later down the road. During a race, it’s hard because we’re already in the zone, we don’t want to sacrifice all of the time and training that’s gone into it and sometimes, yeah, it’s better to suck it up and push through. However, calling it quits because of worsening pain, doesn’t make you a wimp, it makes you a smarter runner. Running will always be there, trust me.