Will a hip pack bounce when I run with it?

Reviewers consistently say fit matters more than brand. Slim elastic running belts worn at the natural waist (not the hips) get the best no-bounce reports, while larger 3–5L lumbar packs need to be cinched tight and worn with a stabilizing hip strap. A loaded pack that swings is almost always a sizing or strap-tension issue, per running-subreddit consensus.