Centuries before modern sport · Japan
The Martial Traditions of Japan
Japanese systems of unarmed combat developed around the needs of warriors who might lose a weapon or be forced into close range. Rather than relying on strikes alone, they built methods of throwing, pinning, controlling, joint locking, choking, escaping, and turning balance and leverage against force.
Different schools developed distinct systems, customs, and technical priorities. Those varied traditions later became broadly associated with the terms jujutsu or jiu-jitsu.
Leverage was the answer to strength long before it had a name.