Can Your Martial Arts Kick Really Break Their Knee?

Can your martial arts kick really break someone’s
knee? Is it worth your time to practice it? Stick around to find out. A
couple of weeks ago one of my female martial arts students approached me a said that an
unnamed self-defense instructor told her “never kick a man in the testicles because it will
just piss him off. Instead she should kick him in the knee and
break his knee.” Now is that even realistic? Let’s go find out. Now it’s pretty hard to recreate that in a
fight because people are moving around, people usually have bent legs, and let’s be honest
a real fight is hectic. We are also not going to be diving and landing
with all of our weight committed at someone’s knees that would be a pretty irresponsible
thing to do in a fight. Some of us weigh more, some of us weigh less,
some of us can do a really fast explosive kick, some people don’t have enough training
yet. All of these variables are going to come into
play when we ask and answer the question of whether YOU can break or injure someone’s
knee with a kick. Let’s take a closer look at what happens when
martial artists kick at other martial artists. So none of these knees were broken by the
way from these kicks. Here are some of the reasons why. If you notice both of these fighters are in
motion and that’s going to make it really hard to land solidly. landing at an off angle means your kick will
skid off and it’s only going to deliver a fraction of the force at impact. most kicks will land on a bent knee which
can absorb the impact better than a fully locked knee. there is also a sweet spot where the force
from you kick is the strongest where it can actually penetrate through the knee and potentially
hyperextend it or move it past an end range of motion. Any further and you are just touching the
leg any closer and your kick gets jammed. and let’s be honest 2 men running full speed
and one tackling the other’s leg with their shoulder is a hell of a lot more impact and
penetration than even the strongest martial arts kick. So can a kick to the knee actually break the
knee? highly unlikely within the realm of possibility
but highly unlikely. could a kick to the knee if it lands just
right with really good technique and sufficient body mass behind it wrench the knee cause
a sprain? yes that’s definitely within the realm of
possibility I’d say a moderate chance. there are some other uses for delivering kicks
to the knee why don’t we get in and explore some of those uses and and a little bit of
application. Here we go. the shuffle side kick is your longest tool
against your opponent’s closest target thus allowing you to stay outside of punching range. this also allows you to control distance you
can use it to unbalance them and create an entry you can use it to get them to drop their
hands to create an entry. while you can use a front kick to the knee
it’s a bit riskier because you have to be in your opponent’s punching range. unless you have super long legs. to ensure highest success you must turn your
foot oblique or you can skid off easily a side kick is going to create that perpendicular
angle that you want. when clenching an oblique stomp kick can take
someone down. so let’s recap what we have learned. will a kick to the knee break a knee? probably not. it could potentially cause a mild injury or
sprain and it can also just get in someone’s head and make them worry about their knee
which allows you to create distance and keep distance if you want to do that. it allows you to go in and disrupt their balance,
you kick them in the knee it knocks them off balance now maybe you can come in with a flurry
of strikes. if you are tiny and they are big with tree
trunk legs and you kick them in the knee guess what is going to happen? nada! so do I recommend that YOU practice
kicks to the knee? if you are a self-defense novice and you are not looking to become a
life long martial artists then the answer is… NO! do not practice kicks to the knee. you are not going to have sufficient repetitions
to have the balance, timing, rhythm, coordination, the skill, the ability to land and recover. what happens if they move into you and they
jam you? you are going to get knocked off balance and
then fall down and find yourself in a ground fight. so if you are a novice absolutely not. stick to THE king of all kicks which is a
simple kick right up main street right to the testicles, you can’t beat it it can sometimes
end a fight and if not it can set up the end of the fight. now you might be a life long martial artist
you might be committed to working that side kick you are committed to working those various
ways to kick the knee… yeah if you are agile and have sufficient body mass and you are
willing to put in the reps I think it is a great kick i’ve worked the heck out of it
and i love it but understand it’s limitations you are out there on gravel or ice you better
not be moving around all fast with some side kicks or you are probably going to slip and
fall down like any tool if you want to be good at it you’ve got to get your reps in. here are some ideas like any tool in martial arts and self-defense
a kick to the knee has it’s place its probably not what you’ve been told but it can be very
effective if you are willing to put in the reps on that note peace out go get your reps
see you next time

42 thoughts on “Can Your Martial Arts Kick Really Break Their Knee?

  1. Yes many martial kicks can break à knee. I have break two in my martial life, with no intention to do that, Just my partner Who turn to move at the bad time… in my opinion, its not the stricke Who si important, its the angle of the leg when thé sticke arrive. If you want to break à knee you have to move your ennemies in thé right angle. Its only for life and death situation, its what i teach to my student. Remenber that your opposant Will be handicap for the rest of is life… .

  2. Note that they fight bare-foot in these competition fights.

    Tho I understand that tho it may Not necessarily break the knee, it could injure [and believe me I do my reps: 5 x 3min rounds per session].

    But good use for (and the way I was taught, doing it on side of the knee); is to make taller person have to come down [in order to prevent injury]: thereby setting himself up.

    On another point [in this video]: front kick is more like weapons distance. Knee would be more like punching distance.

  3. Yes I worked in a prison as an officer a fight broke out in a work party .. one big guy threw a punch one small guy threw an oblique kick fight done big guy off to hospital broken knee.
    Both men were wearing heavy work boots. . Bare foot I don't think so especially if they are ready for it.
    In a self defense situation where they are expecting you to fall down and cry definitely. . From that day on it only ever wear boots.

  4. there is no reason to "break" the knee……..the only thing you need to do is dislocate the knee cap. Kneecaps are easily dislocated and extremely painful when dislocated. The idea of self defense is to not get hurt. SO by disabling the attackers leg so he can no longer stand is an effective way to end the fight. The easiest way to dislocate a kneecap is to kick it to the outside of the attackers leg. You legs are more than strong enough to move someone's kneecap. Even if the kneecap moves back into position on the attacker's leg he will still be in alot of pain and will have trouble standing, giving you time to get away .

  5. yes i watched the Special Air Service regiment train kicking through the knee, but they kick just below the knee with the centre of the foot base and drive the whole body weight through to the floor, the same like a stamping action on a head.

  6. Yes you can break the knee with a's about angle. With that said it shouldn't be your initial goal. Knee kicks are best for controlling distance and breaking down your opponents will. I don't agree with not practicing knee kicks through. How else are you to learn it?

  7. Nice, informative down to earth video. I'm going to add your channel. I'm recovering from a torn acl surgery right now from training. Thai clinch into a sweep from a knee inflection.

  8. I train my fiance and i teach her side kicks to the knee cause the knee is easily damage breaking the knee cap and they won't get up and side kick is more likely to land it's what my teacher taught me at white belt level

  9. 1. That guy in the first picture was kicking wrong he overextended his knee. 2. It was a front kick which doesn't have the same power as a side. 3. Yes two trained martial artist fighting going to make it hard but martial arts is for self defense and if your getting mugged or attacked on the street by a random person odds are they have no training and has a bad stance and breaking their knee will be easy

  10. It can, an Oblique Kick to the knee from an outside angle to the lead leg will disable it. I disagree with all of the JKD principles of scoop kicks to the groin, every guy expects a groin kick in a street fight compared to a knee stomp and with their general lack of leg conditioning I find it highly effective. JKD is very unreliable because of its over exaggeration of one hit knock out strikes like the finger jab which has no effect when it misses, the thing about a knee stomp is that even when you miss your intended target you still hit secondary targets like the shin. This is why modern street fighting systems emphasize techniques like Palm Strikes, if you don’t finger poke the eye you still have a technically sound strike to the lower face behind it or the finger poke is just a bonus to the palm strike connecting. And if people aren’t willing to do depictions then they aren’t interested in defending themselves and deserve exactly what they are going to get.

  11. You can break the knee but the problem is the techniques. Most people do it wrong. 1) They rely on push kicks. Those don't generate alot of power. They are for creating distance rather than being offensive attacks. 2) There's no body weight behind alot of kicks. They are done in a static standing position. No body weight applied = no power.

  12. momentum = mass * velocity

    Force = d(momentum)/d(time) = mass *d(velocity)/dt = mass * acceleration

    impulse = Force * (time that this force is applied)

    If the impact time is very small, we have that:

    impulse = d(momentum) = mass * [d(velocity)/dt] * dt

    So from the initial moment (Tinitial) to the final moment (Tfinal), we can say that:

    (momentum in Tfinal) – (momentum in Tinitial) = mass * (velocity in Tfinal) – mass * (velocity in Tinitial)

    So if we use "fighting terminology", we have that:
    (impulse during strike) = (momentum after strike) – (momentum before strike)

    = [(mass moving as a block upon impact) * (speed of the mass AFTER impact)] – [(mass moving as a block upon impact) * (speed of the mass BEFORE impact)]

    so, in CONCLUSION:
    (impulse during strike) = (mass moving as a block upon impact) * (speed variation of this mass during the strike)

    So if he's moving into you, it is more likely that your final speed will be 0, or even negative (he pushes you back), so the impulse will be maximum. But if he's moving away, your kick will not slow down so much (speed after impact is similar to speed before impact), so he will receive less impulse, that is, less force will be applied during the time of impact.

    That is why running/JUMPING FORWARD as you strike is more effective than standing still, because when you jump forward or run forward, there is more mass that has speed, and not just your arm/leg. Of course, it's very complicated to calculate the speed of your fist, because you combine many speeds: the LINEAR velocity of your legs relative to the ground, plus the ANGULAR velocity of your hips when they rotate, which create a linear velocity on your shoulder; and then you also add the speed of the fist relative to the speed of the shoulder, and you also add some angular velocity as your elbow arches out, which gives your fist more linear velocity on impact. All those speeds add onto your fist. But then it's also important how well you can HOLD YOUR BODY STIFF DURING IMPACT, so that the force continues to be applied, because if you cave in/retract very soon, you will stop applying force. That is why most full contact fighters drive through with their strikes, and then use a circular motion to bring their arm back up without ever stopping.

    I'm an Engineer, but it takes a lot of brains to apply these formulas properly for real scenarios, so bear in mind that my approach is probably over-simplified.

  13. Your doing the wrong kind of kicks in this vid… makes me think this guy doesn’t know what he’s talking about..

  14. I wear boots with reinforced steel caps. I'm pretty darn sure I could break an attacker's knee in a self-defense situation.

  15. you are kicking wrong, this can easilly miss and they see it, you are telegrafing you kick, instead kick like Bruce Lee in JKD, then it is very fast stopping kick and att the same time can really hur opponents knee id you have shoes, you are doing back flip kick , isted do side kick , fast, look how Bruce Lee did it

  16. Seems to depend completely, upon angle of attack, location of target, timing and amount of force.
    However, even if you miss, it seems that the intent would be CLEAR.
    quite enough, to quickly incentivize the other guy to come up with a new activity.

  17. Yuo could but i can bet you you'd injure him enough for him to be in so much pain they'll be down for the count

  18. It all depends on the body type and posture . If a very tall guy with low body weight that tends to lean his weight on his knees …he would have his knee obliterated with a nice front stinger kick . Your kick plus all his weight will collapse on the target .

  19. If your enemy predicted that kick even if he catch the kick, it will not break the knee. Why? Because you can make your muscles harder

  20. You just step to side up your leg and strike his side knee with full power and speed but is hard application,you must doing it on the right time to break or create enough damage,is like a oblique kick but you need step side and give the kick on the external side of the joint,this kick is so powerful that if not break will cause instantly fall of the opponent,but you need generate strength,power and impact enough to break woods,some of this wood that are used on karate.

  21. If your fightin and that person is in a boxing position, or better trting to find angle you can throw am oblique kick to the knee easily, btw whats up with the side kick thumb nail. Front kick is way different my friend

  22. Btw a front kick to the knee is thrown from an angle, where you can see the knee cap exposed. That shit looks clean. Haha

  23. I can prove to you that shit works too haha my bad if im coming out cocky you just sound like you really havent done research. Be like water.

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