My plan soon calls for hill sprints and while I have done hill sprints in the past, I’m kind of curious to hear opinions on what kind of hills I should be looking for.
I live in a fairly flat area, so most “hills” are only a few meters elevation, and mostly around 3-4% grade - which doesn’t seem very hard. We do, however, have a few artificial hills, but they are generally pretty steep and only one of them have a good firm trail leading to the top. This trail is around 20+%, so pretty steep, but absolutely runnable (I’ve used it several times).
Should I focus on the steepest, runnable, hill or should I rather sprint faster on the easy hills?