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I'm completely new to martial arts. I would like to know if there are techniques that can be used in self-defense if you had one hand tied behind your back or in the case you lose your hand?

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There's an entire African-styled form called "shackled hands" that's essentially for applications while handcuffed. You could also distract an opponent by throwing your severed hand at them. –  Dave Newton May 30 '12 at 13:57
    
I'm struggling to think of a scenario in which you have one hand tied behind your back, rather than two. I'm also unclear about "losing" your hand - is that literally losing it (in which case you're bleeding out rapidly) or losing the use of it due to injury? –  Robin Ashe Jul 4 '12 at 10:24
    
I had to a few years back when I snapped a chest muscle grappling. So I trained one-handed for a couple of months to let the muscle re-knit. –  Wudang Mar 31 at 12:57
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5 Answers

In one school I trained at we would change the sparring rules up to

  1. keep from getting locked into patterns that were driven by the rules and
  2. simulate disadvantages you might labor under.

Sure, you can can do various things one handed---blocking and punching with the other hand for instance---but it is much, much harder. Use your legs for trips or kicks. Run away if time and circumstances permit. Yell for help.

Being tied will also affect your balance, and the range of motions available to you.

No fun.

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There are plenty of techniques available to you if you only have one hand available, but it really depends on which martial arts you're referring to.

Locks

In our Hapkido classes, we'll randomly practice our grabs in different scenarios (eyes closed, kneeling, lying down, sitting on a chair, one hand behind our back, etc).

It teaches you to really understand the concepts behind how a specific technique works and how to adapt to whatever situation you might be put in. It also forces us to learn how our entire body is used to apply techniques and generate power. From a kneeling or seated position, you really have to adapt how your apply certain locks when you no longer have the full strength/power/mobility of your body — it forces you to rely on technique rather than brute strength.

Strikes/Kicks

I often practice my kicks with one or both hands behind my backs, not for any practical reason, but more so just to gain a greater understanding of how my body and balance is affected in different stances or scenarios.

In real life situations, you never know what you might injuries/limitations you might have to contend with, so practicing dealing with them in class can be very beneficial. Even if you don't put that one-handed technique into practice, it still helps you expand your understanding of how the technique works.

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Absolutely. Actually, one of the schools in the Bujinkan (Gikan-ryu) was reportedly heavily influenced by the inclusion of a one-armed soke.

There is, of course, a strong natural disadvantage (all else being equal) to having only one arm available (for example, the opponent knows your high attacks will largely come from that side, you are not naturally balanced, etc.), but martial arts are about learning to compensate for your disadvantages. Most (un- or under-trained) people fight as if they have an arm, an arm, a leg, and a leg; not as if they have one body.

To give an example, I have a couple of techniques from Gikan-ryu that exemplify a one-handed approach. NB: These are from my notes, according to my understanding at the time of learning, and may not be typical of all students in the Bujinkan. These should not be attempted without proper supervision as injury will likely occur. I've used the left hand so I can copy from my notes directly for ease, but the techniques are meant for either side and do not require both hands.

Gyaku Mune Dori

Reversing Lapel Grab (Left hand only, exemplifies lock and throw.)

  • Uke grabs both lapels.

  • Tori steps in and right at 45° angle, weaving left hand over uke's right arm and under uke's left. Tori slides right foot forward into kukan to lock both elbows, pulling elbow in and pushing hand out, disrupting balance. Step across with right foot at low forward 45° angle to throw.

Ichimonji

Straight Line (Left hand only, exemplifies lock and throw.)

  • Uke grabs the right lapel with his left hand and performs tsuki-ken.

  • Tori drops to the right knee to unbalance uke, and swings the left hand up to parallel incoming tsuki. Tori takes the wrist and twists clockwise while rising to lock uke's arms in jumonji (taking uke's right hand below). Tori swings back right leg to throw.

Tsuri Gane

Hanging Bell (Left hand only, exemplifies striking and throwing.)

  • Uke performs a tackle around tori's midsection.

  • Tori wraps left arm around uke's chest, kicks to kinteki (testicles) with right foot, and swings right foot across into yokonagare to pull uke over.

Breaking it down

At a very, very basic level (and since you're new, this will be the case), you fight with your arms and your legs. You likely move deliberately, each technique performed step-by-step. This is a very low-level style of training, though.

As you improve, your body is one body. The exclusion of an arm is compensated for by the actions of the unified body.

This is all well exemplified by the story of Senju Kannon (千手観音), the 1000-Armed Boddhisatva in esoteric Buddhism (mikkyo). As Takuan Souhou wrote in The Unfettered Mind:

Considering that the Thousand-Armed Kannon has one thousand arms on its one body, if the mind stops at the one holding the bow, the other nine hundred and ninety-nine will be useless. It is because the mind is not detained at one place that all the arms are useful. As for Kannon, to what purpose would it have a thousand arms attached to one body? This form is made with the intent of pointing out to men that if their immovable wisdom is let go, even if a body have (sic) a thousand arms, every one will be of use.

By this same virtue, we can see that men have the preconceived notion of not understanding the idea of having more than two arms any better than having less than two. Through training, we let go of distracting thoughts to learn to act and move naturally.

Whether a man has no arms or ten, if he trains his body to move as best and as efficiently as possible, he will always be more capable than the man distracted by his own thoughts.

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Yes there are tools to work with when you can not really use your hands. The idea of loosing your hand is a bit ... As you would go through Hades.;-)) I can see use hands free techniques in sudden attack situation where you are taken aback and there is no time to rise your hands, or in a crowd where your hands are obstructed, or when you are holding someone and you get under fire.. (Just expression of being battered) So. Use your shoulders, this is a massive bone with massive muscles, if you doge with your head and get behind works well. Shoulder shrugs to deflect, get covered or even hit. Way of practising. First partner must attack slowly and be realistic you can not block Mae geri chudan with it;-) You keep your hands in your pockets and have fun. Practise in diferent distances but preferably close combat as common sense you would see attack comming from the long distance and there would be plenty time to use hands. Have fun

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Sticky Hands

I knew a guy in martial arts who lost his arm in an accident. As a result, we adapted the forms so that he could use only one arm to effect the techniques. This ended up being quite a learning experience for me. The way we did it involved a lot of sticky hands type maneuvers. I dunno if you've ever seen chi sao, push hands, or hubud-lubud, but doing a search on youtube for those terms should be quite instructive. They are sensitivity drills designed to develop reflexes and trapping skills. Push hands develops sensitivity but is less about trapping, and more about unbalancing the opponent.

As an example of how to use one hand in a sensitivity drill, imagine that your partner is throwing a jab-cross combination at you repeatedly. Ordinarily, you would block each hand with a pak sao ("slap block"). This is a "sticky" palm parry that remains connected to the opponent after contact. If you have one arm, instead of doing a pak sao with the other hand, you block the cross with a tan sao ("palm up block") from the same hand you just did a pak sao with, which also remains connected to the opponent. When the next jab comes, you pak sao again with the same hand and repeat the drill until one of you gets tired.

Link to Tan Sao image

Link to Pak Sao image

Minimal Protection

If you have some of your arm left, don't forget that the nub can offer you at least some protection for your ribs or head, but use footwork and positioning in combination with this minimal protection rather than relying solely on your nub.

Rolling Strikes

Some martial arts, like Northern Mantis, Kempo, Kajukenbo, and Boxing, use follow-up strikes with the same hand. For example, you can throw a jab and roll back out with a back-fist. Also you can try combinations like low right hook, high right hook. The low right hook will bring his guard low on the right side so you can gain access to his temple for the high right hook.

Here's a Kempo pattern that develops "rolling" strikes:

  • Horse Stance.
  • Chamber both fists at the hip.
  • Double straight punch out.
  • Roll both fists in and then out to high backfists.
  • Roll both fists in and then out to low underhanded hammer strikes.
  • Roll both fists out to double hooking temple strikes with the back of the back of the hand facing inward.
  • Roll both fists out to strike low to the ribs with hammer strikes with palm facing up
  • Return both fists to chamber at the hip.
  • Practice the same pattern facing left and right with only one hand and without changing your stance

In case it's not obvious, if you only have one hand, you can only do that side of the pattern. I present the "double fists" form of the pattern to preserve the way that it was taught to me. For those with one arm, do only the forward facing portion of the drill, and the side of the drill that is facing the arm you still have.

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