The average adult human can kick with 1,000 pounds of force. The average child can deliver 600 pounds of force. These numbers can increase greatly with training or due to height, weight, and unique skill at kicking activities
Both BJJ and Judo use a Gi, have similar techniques and were created for anyone of any size or fitness level. However, BJJ matches have a time limit and favour ground-fighting over standing due to a different point system. Judo is also more fast-paced and regulated and has a different belt system.
A rabbit punch is a blow that lands on the back of the head or top of the neck. It is illegal because back of the head is a place where our key motoric and brain functions are located. A single rabbit punch can cause serious spinal cord and brain injury that could be fatal in some cases.
The key difference is that freestyle wrestling involves all parts of the body while Greco-Roman does not allow contact below the waist.
Krav Maga is not classified as a martial art. Instead, it is a self-defense and fighting system that was developed for the Israeli Defense Force as a hand-to-hand combat style that was taught to their soldiers. Krav Maga is a mixture of techniques from boxing, wrestling, karate, aikido, and judo.
Taekwondo can be effective in a fight due to its kicking accuracy and power. However, the major problem with Taekwondo as self-defense is that it does not prepare you for the fight on the ground, where many fights occur.