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If you run regularly - whether you’re building back from a break, chasing a PB, or stacking mileage for a marathon - your legs do a lot of repetitive work. A good massage gun (also called a percussion massager) can be a practical recovery tool: it helps you relax tight-feeling muscles, reduce that “heavy legs” sensation after harder sessions, and make it easier to move well between runs. It’s not magic, and it won’t “flush lactic acid” (that’s not really how soreness works), but used well it can be a genuinely useful part of your post-run routine.