I've been competing in ultra-distance bike races since 2020. In April this year, I decided to take a break from work and see how well I could do if I dedicated one year to training. I chose the Race around the Netherlands in 2024, the race that started it all for me, as my goal race. Training takes up to 30 hours a week, so at time it's like a full time job, but I haven't felt so fulfilled in a long, long time. I definitely recommend it to anybody that has the opportunity.
Very long, relatively easy rides, for the most part. In summer that's 6 hour rides or longer at a conversational pace, in winter it's 3 or 4 hours on Zwift. Sometimes I do threshold work (because it's more fun than Zone 2 all the time), rarely HIIT anymore (these races don't have a habit of having a sprint finish).