I have never carried a full pack if not needed! The pack puts extra stress on my joints and at my age, I do not need this. The best exercise is one that is fun and that you will actually do everyday. Best is to walk uphills if you have some nearby hills. Since I live in a fairly flat area, I alternate a long walk (6 miles) loop along the American River and bicycling 20 miles on the bike trail. The scenery is wonderful. Hauling a pack up and down stadium stairs sounds miserable to me.