Artem Kirillov is not, by nature, the kind of person to take it easy. “I prefer to push myself further, even if I feel a bit off,” says Kirillov, who is 40, lives in London and works in health tech. For a long time, even as a recreational exerciser, he discounted the need for rest days and pushed through fatigue at the gym, believing that more time spent training automatically meant better results.
