I thought of creating my own playlists for working out, but I can say that it turned out to be way too time-consuming and complicated. But I'm glad that many people are interested in that, and it's not a problem for me to find interesting playlists on YouTube. I download such mixes with
Tubidy, and it's actually convenient for me because this service is free, and there's no quality loss after converting YouTube videos to MP3 format.