Anyone have any experience with this? Unfortunately I suffered one three weeks ago swimming into a submerged tree. Xrays were negative last week. I've had no activity for eight days and took prescribed naproxen for five days as recommended. I had chest pain, muscular back and shoulder pain, isolated spinal pain, rib pain and pain breathing. Most had subsided after a little over two weeks, but my max HR Monday morning walking was 172. Yesterday was 156 and today 134. I suppose it's getting better as my max is 178, but I think it indicates my body is still healing. Hopefully it will drop to 100 to 120 the next few days before resuming activity. I don't think I'll start until next Monday at the earliest which would be 3 weeks post injury just to be cautious.