I’d imagine Umamusume got plenty of people into either IRL horseracing, or running.

Personally, I watched the more hyped races, including some that haven’t been adapted to anime.

My favourites include:

1. the 2013 Arima Kinen featuring Orfevre and Gold Ship
2. the 2020 Japan Cup which pitted 3 triple crown winners against each other: Almond Eye who had 8 G1 wins under her belt, Contrail who was an undefeated triple crown and Daring Tact who was an undefeated triple tiara.