Whether you're going for a long run in the park on your lunch break or just signed up for an Iron Man, triathlons require lots of intense training that will push your body to the limit.
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But you don't have to put in the laps and miles completely alone. From GPS watches to body suits, there's a raft of new wearable tech to help turn you into a speedy swim-bike-runner.
Here's our top triathlon tech picks to help you be, ahem, tri-umphant.
Garmin Forerunner 920XT
Whether you're training in the pool, on two wheels, or pounding the road, Garmin's ultimate fitness watch packs everything you need to achieve triathlon fitness.
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The wetsuit friendly timepiece tracks your pace, distance and when you dive in to the pool your stroke count and rate, too. If you're willing to spend a little more, you can always consider the Garmin Fenix 3 as well.
TomTom Spark Cardio + Music
The new TomTom sports watch, which now includes a built-in music player, still packs QuickGPSFix tech picks up your location faster and increases accuracy. So your results are much more precise, a must for keeping a track of your progress.
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Real time information, whether you're running, cycling or swimming is displayed on the roomy screen while the new slimmer design won't weigh you down either.
The V800's headline feature is its fantastic coaching system, which is ideal if you're just starting out your triathlon preparation. With the Polar Flow service, you can create tailored profiles for each sport, balance your training and recovery plus analyse even the most minute details.
Integrated GPS accurately tracks your runs, while the heart rate monitor even works when you've hit the pool.
The latest GPS-toting Suunto timepiece beams all the data it captures from multi sports directly to a fantastic iPhone companion app all in one log, making it the perfect watch for you triathletes.
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There's a compass, speed, pace and distance tracking and it'll give you an activity based recovery time so you can tell when you should take a rest day. The heart rate monitor can also be used when you're swimming, while the tailored training programmes are great to keep you on track.
VRX MP3+ Personal Trainer
This duo of products gives you an underwater MP3, Real Coach training tips that will talk you through your swim as you're putting in the laps.
Plus there's a silicone swim cap that'll keep everything protected underwater.
SKINS TRI400 Compression Tri Suit
The Skins Dynamic Gradient Compression delivers oxygen faster to your muscles, giving you more power. Recovery time is improved too, as lactic-acid build up is reduced.
The Toray fabric minimises drag, ideal for both the water and road, while integrated UV protection and moisture management make this the perfect fit for hot, sunny days.