The immaculately presented Rich Lister, Tim Gurner, is standing and waiting with a towel as I step out of an ice bath having just endured 15 minutes in a 100-degree sauna.
My personal breathing coach, former professional rugby player Eugene Koning, has just been leading me in a chant devised by Wim Hof – a Dutch extreme athlete known as the Iceman – before embracing me in a strong and long hug for the third time.