You probably have at least one friend who is training for a triathlon. They are obsessed with training. They’re always busy with their tri club and they seem incapable of talking about anything else.

According to statistics from Triathlon Australia, the number of people signing up is growing year on year. And it’s not just triathlons. Extreme exercise has never been more popular; ultra-marathons, endurance obstacle races and cross fit games are all gaining more converts.

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