Why You Need To Slow Down In The Heat

Global Triathlon Network โ€ข October 26, 2025
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We all know that racing in the heat feels harder, but how much does it actually impact our performance? Heather conducted an experiment to find out, establishing a baseline for her cycling and running in the cool UK climate before repeating the exact same tests in the heat and humidity of Kona. We teamed up with the experts at Precision Fuel & Hydration, to analyse the data to reveal the impact on sweat loss, power, and pace, with crucial lessons for any athlete racing in the heat. 00:00 - Why Does Heat Hurt Performance? 01:11 - Baseline Testing In The UK 02:05 - The UK Bike Test 02:55 - The UK Run Test 04:01 - Arriving In Kona, Hawaii 05:26 - The Hawaii Bike Test 07:12 - The Hawaii Run Test 10:04 - Analysing The Data 19:48 - Key Takeaways For Racing In The Heat Join this channel to get access to perks: https://www.youtube.com/@gtn/join Useful Links Join GTN YouTube Memberships ๐Ÿ‘‰ https://gtn.io/JoinGTNmemberships Subscribe so you donโ€™t miss a thing ๐Ÿ‘‰ https://gtn.io/subscribe Submit your Photo and Video to us ๐Ÿ‘‰ https://gtn.io/UPLOAD Check out the GTN Shop ๐Ÿ‘‰ https://gtn.io/TeamKit GTN Training Plans ๐Ÿ‘‰ https://gtn.io/qonrQw Insurance: Viewers in the USA and UK can explore Insurance products ๐Ÿ‘‰ https://gtn.io/insurance What's the hottest condition you've ever raced or trained in, and how did you cope with it? Share your best tips for beating the heat in the comments below! Watch more on GTN... ๐Ÿ“น https://youtu.be/Lt1_WefIrk4?si=Ak5RV680t605VX6X ๐Ÿ“น Watch our Editorโ€™s Choice Playlist ๐Ÿ‘‰ https://gtn.io/editorschoice ๐Ÿ“น Watch our weekly show, The GTN Show ๐Ÿ‘‰ https://gtn.io/GTNshowPlaylist Photos: ยฉ Triathlon / Getty Images ๐ŸŽต Music - licensed by Epidemic Sound ๐ŸŽต Borrowed Matches - Tape Machines Coastal Rock Cafe - Auxjack Jakarta - Bonsaye lofi del pueblo - DonVayei My Favorite Time of the Year - Matt Large Seaview - Sulu ix Feet Under - Swif7 Spectre in the Leaves - DonVayei This Makes Everythin... - the Illstrumentalist #gtn #triathlon #swimbikerun #swim #bike #run The Global Triathlon Network (GTN) is the world's biggest triathlon YouTube channel, with new videos every day! GTN is for anyone who loves triathlon: from seasoned triathletes to first-timers โ€“ and everyone in between! With the help of our former pro and Olympic medal-winning team, weโ€™re here to inform, entertain and inspire you to become a better triathlete; including videos on: - How to swim, bike, and run faster with expert knowledge - Try our session ideas - Investigations into wide-ranging topics - The best triathlon bike tech and gear with pro-know-how - In-depth, entertaining features from the heart of the sport - Chat, opinion and interact with us across the channel and on social media! Join us on YouTubeโ€™s best triathlon channel to get closer to the sport and to become a better, faster and fitter triathlete! Welcome to the Global Triathlon Network. Thanks to our sponsors: Canyon: http://gtn.io/canyon-bikes Ryzon: https://gtn.io/ryzon Ergon: https://gtn.io/Ergon ON Running: http://gtn.io/On-Running Orca: http://gtn.io/Orca Precision Fuel & Hydration: https://gtn.io/PrecisionHydration Roka: https://gtn.io/Roka Silca: https://gtn.io/silca Watch our sister channels: Global Cycling Network - https://www.youtube.com/@gcn GCN Tech - https://www.youtube.com/@gcntech GCN Racing - https://www.youtube.com/@gcnracing GCN Italia - https://www.youtube.com/@gcnitalia GCN en Espanol - https://www.youtube.com/@gcnenespanol GCN auf Deutsch - https://www.youtube.com/@gcnaufdeutsch GCN en Francais - https://www.youtube.com/@gcnenfrancais GCN Training - https://www.youtube.com/@GCNTraining Global Mountain Bike Network - https://youtube.com/@gmbn GMBN Racing - https://www.youtube.com/@gmbnracing GMBN Tech - https://www.youtube.com/@gmbntech Electric Mountain Bike Network - https://www.youtube.com/@embn

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