In one experiment, experts in karate, boxing, kung fu, and tae kwon do all took turns striking the dummy in the face.
The researchers were surprised to find that boxing is the fighting style capable of delivering the most force in a single punch.
Boxer Steve Petramale delivered about 1,000 pounds (453.6 kilograms) of impact force, the equivalent of swinging a sledgehammer into someone’s face…
The tae kwon do spinning back kick delivered more than 1,500 pounds (680.4 kilograms) of force, while the kung fu flying double kick produced about 1,000 pounds (453.6 kilograms) of force.
But the undisputed winner practices a discipline known for its ability to deliver a knockout: Muay Thai, also known as Thai boxing.
Melchor Menor, a former two-time Muay Thai world champion, uses a simple technique to incapacitate his opponents: a knee to the chest at close quarters [TC: I guess that doesn’t count as a "punch" Oh well.].
Menor himself was surprised at how powerful this move can be.
"I wasn’t expecting to have the highest force. When he said the power of the knee [kick] was equal to the power of a 35-mile-an-hour [56.3-kilometer-an-hour] car crash, it was humbling."