15 Activities to Try on Your Lunch Break By Jada A. Graves Oct. 8, 2013 Comments SHARE 1. Stretch your legs. Next » 2 of 17 « Back (iStockPhoto) Get outside, people-watch and take a walk. It will improve your circulation and expose you to sunlight and vitamin D, which boosts your immune system and metabolism. Next: 2. Run some errands.