Meet the X-Bionic athletes

Anton Gustaffson

A latecomer to pro competition after years of running "just for fun", the Swedish star is making serious noise in elite ultrarunning. A three-time national champion and one of the biggest movers on the UTMB Index, he’s known for fearless pacing, huge training volume and breakthrough results on tough mountain courses.

"When I reach the peak of a mountain and throw myself down the hill without any doubt in my capabilities or gear, reaching flow at full speed, I truly feel supernatural." – Anton Gustafsson

Achievements

  • 3 x winner, Swedish 100km Championships
  • 1st, Gotaleden Stafett & Ultra, Ultra 75, 2026
  • 1st, KAT100 by UTMB, Marathon Trail, 2025
  • 1st, RunThrough Trails Engelberg, 56K, 2025
  • 2nd, Hong Kong 100, The Half, 2026