TUESDAY, Jan. 10, 2022 (HealthDay News) -- The swimmer came to shore struggling to breathe and coughing up blood.A keen competitive long-distance swimmer and triathlete, the woman was fit and healthy when she started a nighttime open water swim event.But a couple weeks earlier, she’d had breathing difficulties during another open water swim that had forced her to abandon the event. She’d felt breathless for days after.The woman, in her 50s, had fallen prey to what’s becoming better known as a hazard associated with open water swimming – fluid on the lungs, or pulmonary edema.Open water swimming has become very popular, but mounting evidence points to a link between the activity and a condition called swimming-induced pulmonary edema (SIPE), according to Dr. James Oldman, lead...