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How to train for a middle distance triathlon – former Olympians share top tips for going long

Thinking about stepping it up and taking on a middle distance or half Ironman? Get top tips on how to build endurance and adjust your training from two former Olympians who successfully made the jump to going long.

By Jenny Lucas-Hill

Content Director

Last updated -

16 Jul 2025

Most age group triathletes start the sport with shorter distance racing. Dipping a toe into the world of swim-bike-run at a local pool-based super sprint triathlon, before taking on a few open water s...

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Written by

Jenny Lucas-Hill

Jenny Lucas-Hill was Content Director at TRI247 until Sept 2025. A five-time Ironman finisher, she's also a qualified personal trainer and sports massage therapist.

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