Kiwi Andrea Hewitt is travelling to France to be with fiance and fellow triathlete Laurent Vidal after he suffered a heart attack overnight (NZT).
Vidal, who in recent years has been based in Christchurch, went into cardiac arrest following a training swim at a pool in Sete, according to French media reports.
The 30-year-old experienced chest pain while swimming and exited the water to seek help from employees at the pool. Firefighters were called to the scene and Vidal went into cardiac arrest before being revived a few minutes later and regaining consciousness.
The Frenchman was then airlifted to a hospital in nearby Montpellier, where he was placed in an induced coma for at least 48 hours.
Hewitt, New Zealand's No 1 triathlete, tweeted that she was flying to be by Vidal's side and expressed her gratitude for the support she had received: "Thank you everyone for your kind words for Laurent,'' she wrote. "Shocked and so worried!''