Train Smarter.
Race Better.
Data-driven tools to dial in your nutrition, pacing, and race day strategy.
Even Splits Lab is where endurance training meets real numbers. Our articles break down how to train, fuel, and race smarter, with simple calculators to dial in your pacing, nutrition, sweat rate, and heart rate zones. Built for runners, cyclists, and triathletes who want data they can actually use.
The Lab Tools
Fuel Strategy
Running a half marathon? Most athletes need 60–90g of carbs per hour. Find your exact number in 2 minutes.
Plan Fuel
Sweat Rate
Lose more than 1L of fluid per hour without knowing it? Most athletes do. Find your hourly sweat rate in 2 minutes.
Run Test
Pacing Strategy
Want to run a sub-2:00 half? You need to hold 5:41/km. Enter your goal time and find the pace you actually need to hit.
Find Your Pace
HR Zone Finder
Training in Zone 2 but actually running in Zone 3? It happens more than you’d think. Get your personal zones in 2 minutes.
Find Your ZonesLatest From the Lab
Zone 2 Myths: What the Research Actually Says
Zone 2 has had a strange couple of years. It went from a training zone triathletes used quietly to a thing longevity podcasters talk about like it’s a supplement. Somewhere in that jump, a few claims got repeated so often they started sounding like settled fact. Some of them are not. I went through the […]
Does Nomio Actually Work? What the Broccoli Shot Studies Really Show
Nomio has shown up on a lot of start lines this year. Mads Pedersen credits it with his best 90-minute ride ever. Cole Hocker took a shot before a 5K world title. A concentrated broccoli sprout extract selling for around $28 for four doses is now a fixture in pro team fridges, and it is […]
How to Find Your Zone 2 Heart Rate (Without a Lab Test)
Type “how to find zone 2” into any search bar and you’ll get four different formulas within the first five results, each claiming to be the correct one. One site tells you to subtract your age from 220 and take 60 to 70 percent. Another swears by 180 minus your age. A third wants you […]