If you are staying for a few days or even just one day in the Mission Bay Area you can go to the gym. World Gym is located about a mile away from the Beach Hut Bed and Breakfast. World Gym offers great equipment and is very serious of the idea of “working out” You can work out on the equipment and the free weights, plus they have Treadmills, elliptical machines and more for cardio. This is a no-nonsense gym with real people working on their bodies and not just looking at themselves in the mirror.
Check it out and see their low rates, plus they have locations in other cities that you can check out too.