Mathias Lyngsø Petersen is a Danish triathlete born in 1995. He has competed in several high-profile triathlon events and has shown impressive performances. For instance, Petersen achieved a significant victory at Ironman Klagenfurt, marking a notable accomplishment in his career. This race, known for its competitive field, saw Petersen and Dutch triathlete Lotte Wilms emerge as winners. Petersen's race strategy involved overcoming an initial time deficit from the swim portion and eventually taking the lead in the later stages of the race, demonstrating his strength and endurance. Additionally, Mathias Petersen secured a win at IRONMAN Austria in 2023, finishing the race with an impressive time of 7:56:39, ahead of Australian Cameron Wurf and Austrian Georg Enzenberger