After many years of doing all kinds of physical exercises now I think walking is probably the best exercise for health. I have done all kind of stuff: calisthenics, lifting weights, stretching, some pilates and yoga, a lot of qigong, taichi, running, swimming, etc. This is all fine and interesting, but now I have concluded that walking is better than anything else. Maybe it is because it is the most natural form of moving exercise for the human body.   If someone can walk a few kilometers every day, he will be working greatly for his health and wellbeing, and it is also a very good moment to meditate.