Here is a great artcile => Sports Drinks.
That article is pretty much the definitive look at sports drinks.
Essentially for ‘endurance’ events over an hour you NEED an isotonic drink taken by several sips every 10-15 minutes with some fuel in the tank before you start.
for less than an hour a bit of water is a nice to have.
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Sports Technology Reviewer and International Age Group Triathlete
With 20 years of testing Garmin wearables and competing in triathlons at an international age group level, I provide expert insights into fitness tech, helping athletes and casual users make informed choices.
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