As you probably all know from this year, there were some deaths during some triathlon races this year. The incident rates are very low. Check out this article from the Washington Post. You can also read the article from JAMA as well. As an athlete and coach, I encourage you to get a physical to help mitigate any future potential concerns. Training for triathlon is a very safe activity to perform. Just make sure you know the status of your body. This will help decrease the risk of anything happening.
BTW, the computrainer rides are on hold as of now – 4800 Gym is looking to sell the system – we’ll keep you posted!