Over the past two years, Lau Wen Loong has competed in 21 Hyrox races in 11 cities. Provided by Lau Wen Loong

This as-told-to essay is based on a conversation with Lau Wen Loong, 37, who, over the past two years, has competed in 21 Hyrox races in 11 cities around the world. It has been edited for length and clarity.

I hadn't exercised regularly in two years when a friend said to me, "I think you'll be interested in this." He was taking part in Hyrox, an endurance race that combines running with fitness stations. You can race individually, as doubles, or in a relay, and there are both amateur and professional racers. He asked if I wanted to race with him.

My friend ended up doing the race with his wife, so I decided to do it on my own. "Don't be crazy," he told me. But I signed up six weeks before the event and completed my first race in Singapore in August 2024. My final timing was just under 73 minutes.…