the jack of all trades thing isn't exactly true. Most triathletes I know are good at one sport, but not quite good enough, and reasonable at the other two, so think 'hey i know I'll do a triathlon!'
Most i have met seem to come from running/ swimming backgrounds
I myself took to it from a swimming background after being a good swimmer and then suffering a bad injury and never being competetive afterwards, and still to this day the majority of my training is running, because I'm totally the wrong build for it + find it evil in the extreme. Riding my fixed bike sorted out any problems with the cycling leg.
the jack of all trades thing isn't exactly true. Most triathletes I know are good at one sport, but not quite good enough, and reasonable at the other two, so think 'hey i know I'll do a triathlon!'
Most i have met seem to come from running/ swimming backgrounds
I myself took to it from a swimming background after being a good swimmer and then suffering a bad injury and never being competetive afterwards, and still to this day the majority of my training is running, because I'm totally the wrong build for it + find it evil in the extreme. Riding my fixed bike sorted out any problems with the cycling leg.