Some great footage of the Grandmaster in some friendly sparring with a young student. Notice his lack of exertion, his strong posture, and well-timed foot sweep techniques. While he is a great deal larger than his young trainee, he utilizes the all-important Judo maxim of MAXIMUM EFFICIENT USE OF ENERGY. No need to engage in meat-head tactics when there are smarter ways to take down an opponent. The student is correctly taught to BE OFFENSIVE and to have NO EGO on the mat. His efforts are 100%, thereby illustrating the final part of the Judo maxim of MUTUAL WELFARE & BENEFIT. He gets to train at an extreme level, while the Grandmaster uses this time to train his foot sweep techniques and teach his student lessons along the way.