Articles
The Truth About Carbs: Performance Benefits and Long-Term Risk
By: Jennifer A. Kurtz, PhD, CSCS, CISSN, EP-C
The science of carb metabolism, risks of chronic high-sugar fueling, and how to adjust your intake based on training, carb type, and biomarkers. A must-read for endurance athletes.
King of the Trails, Master of Chill: A Conversation with Karl Meltzer
With Karl Meltzer
With the most 100-mile wins in history, Karl shares insights on racing, directing, music, golf—and why keeping it chill might be the ultimate endurance strategy.
First Endurance Partners with Kelly Benefits Cycling to Support Rising Talent
By First Endurance
First Endurance has partnered with Kelly Benefits Cycling to help develop the next generation of elite cyclists. KBS is a top U.S. development program known for producing results—and future leaders.
Matt Denis Teams Up with First Endurance
By Matt Denis
Meet Matt Denis, First Endurance’s new copywriter—and a competitive cyclist who knows the grind firsthand. He’s been channeling pro-level insights into our content all year, and now he’s turning the spotlight on himself in this Q&A.
How We Put the Pro in EFS-PRO
By First Endurance
EFS-PRO is based on athlete feedback, surveys, and testing. The science is complex—but at its core, it’s all about one thing: carbs.
Unbound and Unfiltered: Alex Howes on the Art of Gravel Racing
With Alex Howes
Former WorldTour pro Alex Howes shares how he’s training for the grueling 200-mile Unbound gravel race, drawing on years of elite road and dirt racing experience.
When To Use EFS-PRO vs EFS
By First Endurance
The new EFS and EFS-PRO High Carb formulas are engineered to deliver more fuel and more electrolytes with less bellyache than their predecessors (and, incidentally, than any other hydration mixes). But why have a standard and a PRO?
Elite Fuel for Elite Riders: First Endurance Fuels Cynisca Team
With Cynisca Cycling
Named after a Spartan princess, Cynisca Cycling brings fierce ambition to the pro circuit—racing hard, promoting equality, and shaping the future of women’s cycling.
Cape Epic Q&A
With Robert Britton and Andrew “Lespy” L’Esperance
Rob & Andrew tackled the grueling 800km 2025 Absa Cape Epic together for the first time. Through heat, fatigue, and tough terrain, smart prep and teamwork carried them to the finish—bringing back hard-earned lessons and shared pride.
Holly Breck’s Day in the Sun
By Holly Breck
First Endurance rider Holly Breck shares her breakthrough win at the notoriously tough Redlands Bicycle Classic.
Training for the Time-Crunched Endurance Athlete
Coach and former XTERRA World Champion Josiah Middaugh teaches time-crunched athletes to train smart—targeted sessions, balanced disciplines, and non-negotiable recovery.
FIRST ENDURANCE TEAMS UP WITH HOT TUBES
Hot Tubes Development Team has been a standout presence in junior elite cycling races across the U.S. since the early ’90s, known for producing national champions and future pros. They're also helping grow the sport in North America—powered by First Endurance.