Run or practice

These days, I started to jog for the charity run in the end of April.

Actually, I like running as well as practicing the instrumental. I think there are common thing between these two.
Both of them require myself to continue doing it, and try many many times. Each case seems a little trial, but during continuing it, your skill becomes gradually better.

Now I'm wondering which to do tonight, run or practice. Which do you think I should do now?