Fight stiffness in your neck, back, chest, arms and shoulders with five minutes of stretching you can do right at your desk.

Here's an idea: instead of strengthening your upper back muscles on a rowing machine, or by pulling rubber bands designed by a physical therapist to simulate the same movement, why not try doing it on an actual boat?

If you live near San Francisco, you've got few excuses not to-it's free. Plus, you'll use your whole body, especially your core muscles and legs, and you'll get cardio-vascular exercise.