I was in college, and I had a very specific motivation. My school for all other sports was a bottom of the barrel d3 team, but our fencing team regularly wrecked d3 schools and competed primarily in invitationals/meets against d1 teams (Duke/UNC/Penn state/notre dame/etc.).
To stay competitive without the resources (or being able to get elite high school fencers) we had to work harder than the d1 schools, and I was the captain (despite being fairly average at that level) so I felt the need to put in more effort and lead by example. Then also train the newer students and bench fencers whenever they asked (not included in the 30 hrs), and my fencing coach happened to also be my martial arts coach so I had no excuses to slack there.