Think running, biking and swimming are great for your health? You might be surprised to hear that it’s not always so. The number of athletes and races that result in casualty and not just because of accidents is high. What is even more surprising to hear is that during triathlon races, it is during the swimming part that most deaths occurred. In between 2003 and 2011 out of 31 out of 45 deaths during races occurred during the swim leg.
While most of the deaths seem to be heart related, it appears that many of the athletes suffer from swimming-induced pulmonary edema, particularly prevalent during endurance swimming.
Read more about this phenomena here: http://www.outsideonline.com/1926956/are-triathletes-really-dying-heart-attacks
Bottom line is – you can’t be too careful or cautious. If you are a triathlete and don’t feel good at any point stop. You may not win the race but you may win your life.