I am a college student who will be turning 19 in November. I am thinking about
competing in the World's Toughest Triathlon next year. I have heard that you
should not compete in marathons or other ultra-distance events until you are in
your mid-20s. I am fully grown. What I was wondering is if anyone has any
medical information or test results that they could post with regards to this.
I have been competing in triathlons for 5 years now and have been a distance
runner for 7. This makes me believe that I have more than enough of an
endurance base to be able to train for and complete a longer race. However,
I'd rather be safe than sorry.