I've noticed whenever I work on speed with sweep picking and alternate picking I have tension in my neck, despite trying my best to stay relaxed. It's weird because I can't tell a difference between when I'm just sitting here doing nothing and when I'm actually practicing. I don't feel any more tense or less relaxed, I just notice over time I get some pain. It's never been a problem where I had to stop playing or anything, and I've been told I have good technique. I try to play slow and focus on being relaxed but still feel tight and painful in my neck. Thoughts?