I'd say playing an instrument or walking both are nearly equivalent to meditation, because with the former you're clearing your mind and focusing on playing, an

I'd say playing an instrument or walking both are nearly equivalent to meditation, because with the former you're clearing your mind and focusing on playing, and the latter you're clearing your mind as you expend energy walking while looking at and enjoying nature (or at least that's what walking does for me). They seem to have similar effects to when I have meditated (very infrequently, so YMMV) in the past.