triathlon• He did the swim in the San Diego Challenge, a triathlon that awarded two spots for the Ironman.• He was speeding through the big loop on his bike; he was in training for a triathlon.• My currentmileage is only 10-20 miles per week, but I would like to move up to longer distances and triathlons.• Once he realized his own exceptionalstamina, he advanced to marathons and triathlons, then ultra-marathon cycling races.• He plans to win his age group of the Ironman triathlon in Hawaii when he is 70.• Okay, you're a participant in iron man triathlons?• No worries about sharks spotted in Sydney Harbor for the triathlon.• Now they're tuned up and ready to take the plunge for the triathlonseason ahead.