Jack Conan felt like he had aged 10 years in just months as he revealed it took a long time for him to get over a hormone imbalance that left him at his wit's end.
The Leinster and Ireland back row was confounded that, having prided himself on his fitness and having felt stronger than ever on the 2021 Lions tour of South Africa, within six months he suffered unexplained power outages that left him knackered.
"I remember vividly being out on Rosemount, where we train," recalled the back row. "I was running around and I’m thinking, 'There has to be something wrong with me'.
