The Feed Insider

Prebiotics and probiotics are vital components of overall gut health. It's not so much a question of which one athletes need, but rather where they both fit. In this guide, we'll get into it.

For Ferdinand Airault, UTMB is proof that magic does exist. Training out of New York City but competing in the Alps is just part of his big story. Finishing 25th overall in 21h44min, Ferdinand came away with a race that reminded him why he does this in the first place.

Ryan Collins spent months preparing for the Continental Championship — long rides, heat acclimation, meticulous fueling tests. Then the race started. Here's how 520 miles across Utah actually unfolded.

There are a lot of measures we use in endurance sports to compare one another or gauge our expectations. But one of them is slowly becoming the best predictor of performance. Here's what you should know about fatigue resistance and why it matters.

Dr. Rhonda Patrick was on The Huberman Lab Podcast recently, walking through her personal supplement routine, and three things made her list specifically for the brain: omega-3s, magnesium, and creatine.

Records didn't just fall this year; they got demolished. What's driving that? More carbs, smarter buffering, real recovery — the levers behind Vollering's Tour win and Sawe's historic marathon are more accessible than you'd think.

There's a stack consistently showing up in pro pelotons, ultra kits, and marathon start lines. It's built around lactate reduction. lactate buffering, and an oxygen booster, unlocking more performance opportunity than ever before.

A hydration pack only earns its spot if it holds up over real miles. We have tested and reviewed feedback on a lot of gear, including vests, belts, and hydration packs, to find out which ones were the best. Here's what we'd wear on race day, and what earns a spot in your gear.

David Roche urges that gut training is like any other part of our training: it takes time and intention. Here are his three rules for training your gut to improve fueling and performance.

Allie Ostrander missed Team USA four times this season. She lined up anyway, fought for every spot, and kept going. Then a call came that changed everything. Here's how she earned a spot on Team USA for the World Road Running Championships in Copenhagen.

For a variety of reasons, almost everyone is low on omega-3s. It doesn't get the attention it deserves, but I think the most underrated supplement might just be omega-3 fatty acids.

This guide breaks down what athletes usually mean by lactic acid, what drives that burning sensation, and how to reduce lactic acid build-up during training.

The best supplements for running back your body where endurance, energy production, oxygen delivery, hydration, and overnight recovery start. They don't make up for hard work, they support it. Here are the best supplements for endurance.

Starting today, I'm rebuilding how you shop with us. Learn about our new mix-and-match gel builder that gives you more control. Plus, the ICE Hat that saved Magnus Ditlev at Kona is finally here — ready for your hottest sessions.

Demi Vollering just won her second Tour De France Femmes title, and she didn't do it on just one good day. She won it by showing up to stage nine as strong as stage one, and that comes down to how she was able to fuel day after day of racing.

Athletes have gotten more serious about recovery, and that's changed what they expect from a wearable. Recovery metrics, HRV, and sleep analysis now sit next to normal training data, and a lot of athletes want a simpler device to track it. Here are the best screenless fitness and recovery trackers and what you can expect from them.

Longevity isn't about slowing down; it's about staying able to train hard, recover well, and keep loving your sport for decades. Here are the three supplements that consistently earn a spot in that conversation.

Creatine research is rock solid. Creatine quality control is not. Labeled doses don't always match what's in the container, and third-party testing is the exception, not the rule. Here is how to pick your creatine and the different formats you can choose from.

Athletes ask us about protein more than almost anything else. Not only that, a new study in Sports Medicine just moved the target higher than we previously believed. Here's how to actually hit that number without living on just shakes.

Your bloodwork says your iron is fine. Your legs say otherwise. Turns out both can be true. Here's the mechanism nobody explains and how this colostrum gets it right.

Kirsten Kasper came into IRONMAN 70.3 Boise with a bad back, a missed race, and a goal of top five. She left with the win — after coming off the bike five minutes down and running through the field on the back half. She breaks down exactly how it happened.

It's time to reflect on the hottest products of the summer season so far — backed by data from you. From the stuff we can't keep on the shelves to the biggest launches of the year, here's the summer recap.

Most performance supplements overpromise. Sodium bicarbonate doesn't — the science on bicarb is solid, and even the IOC calls it one of the most effective legal performance enhancers out there. From ultras to time trials, here's why bicarb is suddenly everywhere.

Moriah "Mo" Wilson embodied the true spirit of sport and competition. Her legacy will continue to inspire, support, and enable people to get outside and do what they love.