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Show HN: A nutrition companion for endurance athletes

6 points by bravang 2mo ago

Hey HN! 6 Months ago I soft launched https://mavr.app/ https://mavr.app/, an IOS companion app for any endurance athletes nutrition. Over the 6 month period we valid some of our key features: 1) Gut training during training your training block, making sure you can handle the carbs during your race 2) Performance focused meal planning. Making sure you can get everything our of your key sessions and recovery optimal 3) Race aware fueling plans. Making sure your fueling plan is efficient and planned specifically for your race course with our 1k+ race course library. We've been aiming for a slow takeoff, so we still had room to tweak the app together with some top athletes in their sport. In the meantime 30+ athletes completed a race with Mavr. All reporting a 20-30% performance gain during their training block and around an 8-15% gain during their race. Happy to chat more about nutrition and endurance sports! Let me know if you have any questions, ideas or feature requests!

Luucas40 2mo ago
Hey, curious how you tracked the %gain? They seem super high, which is entirely possible for people who didn't take they nutrition as seriously before if you managed to get them fully on board with the app. And something I'm totally unfamiliar with, how does someone "gut train"? It's an interesting angle for a training app as this is definitely a recurring issue in the endurance world, good luck to you!
- bravang 2mo ago
  Hey! The % gain is self-reported, from post-race surveys we push to users. So it's not a controlled before/after, more a proxy. Worth flagging there's selection bias too, the users motivated enough to fill out a survey after finishing a race were probably also the ones who stuck with the plan. Gut training is basically progressive overload for carb absorption. Your gut has a ceiling on how many grams of carbs it can process per hour before you get GI distress, but that ceiling isn't fixed, you raise it by repeatedly practicing high carb intake in training until your body adapts. Almost nobody trains this, then tries to hit 90g/hr for the first time on race day and blows up. It's probably the most skipped part of endurance prep.

6 points by bravang 2mo ago

Luucas40 2mo ago

Hey, curious how you tracked the %gain? They seem super high, which is entirely possible for people who didn't take they nutrition as seriously before if you managed to get them fully on board with the app. And something I'm totally unfamiliar with, how does someone "gut train"? It's an interesting angle for a training app as this is definitely a recurring issue in the endurance world, good luck to you!

bravang 2mo ago
Hey! The % gain is self-reported, from post-race surveys we push to users. So it's not a controlled before/after, more a proxy. Worth flagging there's selection bias too, the users motivated enough to fill out a survey after finishing a race were probably also the ones who stuck with the plan. Gut training is basically progressive overload for carb absorption. Your gut has a ceiling on how many grams of carbs it can process per hour before you get GI distress, but that ceiling isn't fixed, you raise it by repeatedly practicing high carb intake in training until your body adapts. Almost nobody trains this, then tries to hit 90g/hr for the first time on race day and blows up. It's probably the most skipped part of endurance prep.