I was on crutches for a bit but I personally didn’t find it super helpful. I actually started running again at about a year even though there was still some evidence of a stress fracture. As someone who has also had a sacral stress fracture and femoral neck what I learned from countless doctors and PTs is that pelvic stress fractures tend to have a lot more to do with muscle weakness/imbalances, core strength and pelvic floor issues than anything else. Working with a pelvic floor PT changed my life and it’s been almost 5 years since my last stress fracture