Recently I have become interested in an ancient Chinese martial art Tai Chi.
There are different styles of Tai Chi, and the class that is offered through my local YMCA is Tai Chi Sword. Yesterday I attended the class, and it was too advanced for me. I tried my best, and at times, when I was in sync with the soft Chinese music played in background, and when my steps and body movements were correct, I felt so light. The arm movement, that represents sword techniques, looks like easy when you watch somebody else doing it.
When you try doing it yourself, you will find out, that the lightness of the movement comes from the body flexibility and strength, that is acquired though repetition of the movement and overall preparedness of one's body to do this type of physical activity.
I love it.
Please see this link to get an idea how it looks like.