Axe kick is an Offensive kick that is mainly used to target the Opponent's Head, Chest & Clavicle (shoulder). Axe kick is also used as a Breaking Technique and for Self Defense.
Axe kick has a hidden Potential because of the Devastating Force it generates in such a short time and with ease. If one has to use it during a fight then one must remember that your opponent is very weak and tired and not in a position to dodge that, which makes it your Finishing Move.
On the other hand it can also be used to break through your enemy's guard by hitting them on their hands and then using that as an opening one can do a back kick or a front kick.
Axe kick mainly comes from Taekwondo , while in Karate it is used more as a Leg Stretching Exercise and which is why is Potential remains Hidden and Untapped. Axe kick can be very dangerous if it is done using heel and if it hits the head or the back when an enemy is halfway trying to get up.
It can also be done using sole or balls of the feet where one extends his feet and can damage the nose or even break it. Raising the leg early in the technique and apprehending the upper body to be leaned back during the leg-lowering period seems to be beneficial for high impact velocity. Furthermore, striking by extending the hip rather than by flexing the knee could raise impact velocity.
A Martial Artist can use either their Lead or Rear Leg to do this Kick.
It's more effective if the heel hits the target rather than the sole or balls of the feet because the Heel area is a more harder bone area .
For Self Defense, this kick can be used against targets such as the face or shoulder bone of an attacker.
This kick should only be used in certain situations because the martial artist is leaving their groin exposed for a counter attack and thus a very open invitation to get defeated themselves. Make sure that your enemy is weird out.
In order to maximize the effectiveness of this kicking technique, martial artists need to work on their flexibility because the higher the leg is raised the more force is produced.
Make sure that while pulling down the leg it is brought down with full Thrust and not casually so that there is a multiplier effect on the enemy.
The biomechanical factors instrumental to the success and effectiveness of an axe kick are based on the three aspects of the kick:
1) the maximum target height,
2) the inertia of the kicking leg and
3) the speed of the kicking foot.
The height at which an athlete can make an attack is determined by the anthropometry of the fighter (e.g. body height and leg length) and the flexibility of the fighter. For an axe kick to be effective, all movements of the kicking leg need to have minimal execution time. Thus the dynamic posture / kinematics of the kick should minimize the moment of inertia of the kicking leg during the power load phase.
The power of the axe kick is directly determined by the speed of the kicking foot, as it drives downward toward its target. Thus the degree of extension of the kicking leg and its angular velocity should maximize the speed of the kicking foot..
The Taekwondo axe kick may be performed to generate maximum momentum on impact, but this may not be advisable in terms of safety to the one be in ghit. The axe kick is easy to get tangled up and jammed by the opponent, which could result in the attacker falling.