Yousuli

Yousuli is an endurance performance lab and coaching hub serving triathletes and runners. Its offerings combine performance testing, practical training support, and a broad collection of tools designed to help athletes prepare, train, and race with greater insight. Services include VO₂ testing, race-ready training plans, and on-site swim coaching, alongside a social club and membership program.

Athletes can access free calculators and resources covering running time predictions, triathlon finish times, race fueling, sweat rate, calorie burn, critical swim speed, cycling power, heart-rate zones, and more. Additional tools address training intensity, body composition, strength, pacing, and race qualification benchmarks. Yousuli also shares education and articles through its blog, and features supported athletes, sponsors, and member perks.

The site identifies Coach Frederic Simon and provides contact information for inquiries. By bringing coaching, performance resources, and community together, Yousuli supports endurance athletes across swimming, cycling, and running, with a focus on informed preparation and race performance