Biathlete Gro Njølstad Randby stunned by mono diagnosis: "Completely unreal"

Norwegian biathlete Gro Njølstad Randby received a shock in early September when a test revealed she had mononucleosis (glandular fever). She had noticed only swollen eyelids for several days and otherwise felt reasonably fine, but the swelling persisted. A test confirmed mono, leaving her “completely unreal” feeling about the timing just before the new season.

Randby, 23, made her first appearances at the top level last winter with nine World Cup starts. The plan was to build on that, but the illness has kept her completely off training for two months. She has only just begun a careful return-to-activity plan and has spent time on studies, music, and other hobbies while recovering.

The setback means she will miss the season opener and likely be sidelined until after Christmas, though she hopes to race earlier if recovery allows. “Everything kind of collapsed—the training, preparation, dreams, and opportunities,” she said, while stressing she believes in her rehabilitation plan and in returning strongly.

Her partner, national team biathlete Martin Uldal—who had mono at age 20—was the one who suggested testing after noticing familiar symptoms. He advises patience and a conservative rebuilding process. Uldal believes Randby had the level to contend for a World Cup roster spot for the opening round in Östersund if healthy.

NRK biathlon expert and Olympic champion Marte Olsbu Røiseland, who has also had mono, urges Randby to give her body time and not rush back despite the Olympic season ahead. Røiseland expects that once healthy, Randby can quickly regain last year’s level and even use the downtime to sharpen her shooting.

Looking toward the Milan–Cortina 2026 Winter Olympics, Randby acknowledges a participation this season would be difficult but does not rule it out entirely: if recovery aligns perfectly, she hopes to put herself in contention later in the winter.