I see this thread is a lil old, but the subject is near and dear to me. I work out (cardio & strength training) 5 days almost every week for the better part of 20 years and, in recent years, when my alcohol intake has climbed to an uncontrollable level, I have had numerous issues with stress fractures. I used to average running between 35 & 40 miles a week and have since cut back due to these problems. My General Practitioner is aware of my drinking problems, but my sports medicine specialist is not. I have not been told by either that the 2 (alcohol and my bone health) are related, but I can't deny the coincidence and I honestly believe it is completely attributable to my drinking.