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At its core triathlon is as much a mental challenge as a physical one and this may be one reason for its growing popularity at boardroom level.

就其本质而言，铁人三项不仅是身体上的挑战，也是精神上的挑战，这也许是它在高层人士中日益流行的原因之一。

The first triathlon was held in the south-western United States city of San Diego in 1974, in many ways an outgrowth of the California jogging craze.

第一次铁人三项赛在美国西南部的圣地亚哥举行，时间是1974年。 比赛很大程度上源于加利福尼亚人对慢跑的狂热。

Add to this outlay a commitment of at least five or six hours a week for training in the pool, on the bike or running and triathlon begins to look like a way of life rather than just a sport.