Somehow I seemed to have run a 5k or two too many. Last weekend it morphed into the European Duathlon championships. What on earth was I doing there competing for my country. All I wanted to ever do was run 5k a little bit faster. Maybe because I would never be able to run 5k alone as fast as my age-group equivalent Mo Farrah? Who knows (me! I couldn’t)
So there I was running 10k quite fast (for me) and cycling 40k (not so fast) and running my beloved 5k at the end (at a I’ve just-run-and-cycled-a-long-way-pace). For that is what a standard duathlon is. I tell you though if you really train for just 5ks then a duathlon is quite hard. No really an English-understated QUITE hard (ie bloomin’ hard)
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Last Updated on 13 December 2025 by the5krunner
My favourite kit and nutrition
- Injinji – Runners protect your toes. Avoid discomfort and minor injury. Run more. Run faster. I use them.
- Garmin 90-degree charging adapter — A small keyring adapter you can use anywhere. Essential when away. I use one.
- Garmin charging puck — the fastest and most reliable way to top up your Garmin before a session. I use one.
- Ravemen FR300 — Front light that mounts directly under your Garmin or Wahoo head unit. Keeps your bars clean and your beam pointed where it matters. I use one.
- Body Glide – The blue anti-chafe stick that all swimmers and many runners use. I use it.
- Maurten — The race nutrition trusted by elite athletes. Gels and drink mixes engineered to be easy on the stomach. I use them.
- Garmin Varia RTL515 — A radar rear light that alerts you to vehicles approaching from behind. Pairs with your Edge or Wahoo. I use this model.
- Favero Assioma Pro RS2 — The power-meter pedals most serious cyclists choose. Accurate, easy to move between bikes. I use this model.
- Garmin Forerunner 970 — A serious choice for a pro-grade triathlon watch. I use this.
- Polar H10 — My daily driver for accurate, waking HRV readings.
- Wahoo ELEMNT Roam 3 — The bike computer that has the feature Garmin lacks: usability. I use mine on most rides.
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tfk is the founder and author of the5krunner, an independent endurance sports technology publication. With 20 years of hands-on testing of GPS watches and wearables, and competing in triathlons at an international age-group level, tfk provides in-depth expert analysis of fitness technology for serious athletes and endurance sport competitors. ID
