What is your favorite form of physical exercise?

I was born within a five minute walk to the Atlantic ocean, and getting to the beach was not only a shared joy it was good for our young bodies. A couple of fresh water ponds nearby also provided walking and swimming opportunities, and yet I never became a strong swimmer. Being a grown and flexible person, I walk when there is no ocean, and where there is an ocean, I swim. Sometimes the ocean is not a part of any physical exercise besides hearing the sounds, smelling the surf, and seeing the sights.