During my stay, Hannes, the charming hotel owner, made sure I tried everything his health suites had to offer. I was given a medical check, then prescribed a course of cryotherapy — two-minute sessions in a giant fridge programmed to -110C — holistic therapies including moxibustion, cupping and a hot mud bath, and some bracing sessions of Nordic walking round the frozen lake with dazzling Isabella, the resident trainer.