
Nigel Searson
Karate Thesis
UNDERSTANDING PLYOMETRICS
Plyometric training is relatively easy to teach and learn, and it places fewer physical demands on the body than strength and endurance training. It is also a method of developing explosive power, an important component of most athletic performances. Plyometrics is becoming an integral part of the overall training program in many sports.
From the physiological perspective, Plyometrics is perplexing. Practical experience supports its value. Research tells us that elite athletes spend less time during ground contact, yet they impart the same amount or more power into the ground than less skilled athletes. The true purpose of plyometric training is to decrease the ground contact time of an athlete while sprinting or jumping. Ground contact time can simply be seen as the phase of time that elapses while the eccentric contraction (stretch) of a muscle group is reversed and the concentric contraction (contract) of that group begins. So if you look at a long jumper, this phase would be seen as the time it takes when his plant foot hits the ground until he pushes off and leaves the ground for the jump. If he can make that phase happen faster and more powerfully, he will jump farther.
This phase of movement is where all plyometric activities are focused. Once believed to be genetic in nature, research is indicating that this period of time can be reduced. By reducing this phase, we are increasing the speed and power of movement. This translates directly into higher velocities for sprinting, jumping, punching and kicking. Specifically, Plyometrics target the muscles fast twitch fibres. These fibres are in charge of speed and higher power production. Since most sports focus around the need for explosive movements, these are the type of fibres you want to be training.
Using Plyometrics in Martial arts is allot different than using it in sprinting or jogging. The plyometric movement required for sprinting is more repetitious, 'one step after another' so to speak. Once you've got into your plyometric rhythm you just hold it and keep going. The plyometric movements required for karate techniques are different and unique for each technique. Which in my opinion makes it a lot harder to learn Plyometrics in karate, because there are so many different moves. Repetitious plyometric movements may be used in karate more likely when sparing to maintain ma-hi ''distancing'' the distance between two opponents being maintained by bouncing in and out and side to side. Then as you engage your attacks or counter strikes the singular plyometric sequences are used.
TRAINING ASSESSMENT
Before ever starting a plyometric program, you must make a clear assessment of your previous training experience, age, physical maturity and conditioning, flexibility and strength. The more experienced you are in your training, the younger you can begin plyometrics and the more intense the exercises can be. Young people such as prepubescent children should not perform high shock activities, as injury is very easily obtained performing Plyometrics. but low intensity plyometrics could be fine. A full range of motion is a prerequisite for performing Plyometrics. You must also have a good strength base before performing Plyometrics. The individual should maintain a strength program for a few months before beginning Plyometrics. During these strength activities the trainer should pay particular attention to using functional strength activities. Functional strength training simply means training our bodies to better perform the types of movements we use for everyday living. The time spent developing this specific strength, flexibility and agility have the optimum carry-over into daily activities.
TRAINING ASSESSMENT
These are four highly functional exercises you can easily add to your day to create a basic strength training program. They form the foundation for daily strength movements. Performing these several times a day, several times a week will enable you to do more with less effort and with more confidence.
You can do them anywhere, anytime:
TRAINING MOVEMENTS AND METHODS
Their are a wide variety of movements and action sequences in sports. Some are simple and involve few learned skill components, where others are extremely complicated. Depending on your requirements or athletic performance goals, plyometric training has a broad spectrum of simple and complex exercises.
You could examine the major muscle groups involved in movements basic to many sports and provide a rationale for using certain drills to train that muscle group to perform the movement more powerfully.
Below I am going to show you two different types of Plyometric exercises. Although there is a vast range and different types and levels of difficulty to choose from, we are going to look at; angle hops and side hops. Notice these two are a similar exercise but uses different apparatus, also require a different amount of effort and physical level.
The angle hop requires less physical ability, stamina, physical maturity and conditioning. Due to being a more low level manoeuvre, you could use this as a exercise to begin with using an apparatus. The side hop follows a similar pattern hopping left to right, but does require more physical maturity and conditioning, flexibility and strength. Because the hop is jumped over higher obstacles, the impact on your joints, tendons and ligaments are at greater risk of injury. Just as much so performing the 'depth jump/box or platform drop'. Dropping off a box 18 to 45 inches high these require more conditioning than other exercises.
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BASIC FORMS OF PLYOMETRIC EXERCISE |
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Drill: Angle Hops.
To do this exercise you require an apparatus known as a; 'multi angle box'. As shown opposite, there are four platforms with each surface being at an opposite angle to each other. Making sure this apparatus is securely attached to the floor so as not to move while the hops are being performed.After researching this exercise I found the 'angle hop' develops explosive power and speed of reaction in the thigh adductors and ankle stabilizers, which also improves balance and lateral movement. |
To start this exercise stand in a relaxed position on one of the angled surfaces of the box.
To perform the action sequence, hop literally from one side of the box to the next platform and then back to the first. followed by a hop right over to the opposite side of the box, then to the closest platform next repeat the sequence. Try emphasizing a rapid side-to-side motion.
Perform 4 to 8 sets of 8 to 12 repetitions with about 2 minutes rest between each set.
Once skill as improved move on to a larger board where the platforms are further apart.
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ADVANCED FORMS OF PLYOMETRIC EXERCISE
Drill: Side Hops. This exercise involves the use of 2 cones approximately 18 to 26 inches in height. The movement specifically develops the thigh abductor muscles, stabilizers of the knees and ankles, and enhances explosive lateral power throughout the legs and hips. this drill is very useful for all activities employing lateral movement.
Set both cones side by side approximately 2 to 3 feet apart. Assume a relaxed upright stance to the outside of one of the cones. The feet should be together and pointing strait ahead, the arms cocked ready to provide lift and aid balance. |
From the starting position, jump side ways over the first cone and then the second one. Without hesitating, change direction by jumping back over the second cone and then the first one; continue this back-and-forth sequence. Use the arms in an upwards thrusting motion with thumbs up and elbows at 90 degrees.
Perform 5 to 8 sets of 6 to 12 re petitions, with 1 to 2 minutes rest between each set. |
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DEFENCE AND COUNTER SEQUENCE |
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ATTACK SEQUENCE 1
Executing an attack when someone is ready for you and their adrenalin is pumping, isn't always a successful mission. All be it in the street, dojo or in competition fighting. But either one can have different results down to the level of expertness of your opponent.
Lets look at this from a prospective of competition fighting, not that I personally have much experience in this field, this is just an observation because these fighters are trained specifically to move fast and in a plyometric way. You'll need to be as fast if not faster, but not only speed will give you success, a different range of techniques will also be required. What ever the technique you employ, lets have a look at one technique (Below) where Plyometrics takes place, moving off line be it to the outside or inside.
In this sequence you attack Jodan Kizami zuki taking their guard up closing distance, attack Chudan Gyaku Zuki taking them off guard, side stepping along side their body at 45° spinning and attacking Jodan Gyaku Zuki to ST 5. For a knockout, or ippon. This technique requires fluent speed because your attacking on their inside, your open to them equally attacking you. Much safer to go on their outside but you attack any target that presents itself, if that means going on the danger side then so be it!
ATTACK SEQUENCE 2
This sequence not being much different from the one above takes a similar path, showing attacks being made offline at 45°. What I didn't show in this illustration is after attacking Jodan Kizami Zuki, you could leave a little tempting pause offering them on open target to the ribs. If they take it as a Gyaku Zuki, still move offline and attack Jodan Uraken to ST 5 or GB 20. Depending on their body position, putting you this time on their outside position where you could spin and take their front leg with an hooking sweep. Not on their inside as we are (below) finishing off with a Gyaku Zuki.
The key is to try and practice these techniques plyometricly moving side to side trying to confuse your opponent moving in and out opening and closing the range. Or maintaining their range and then moving in. It's not easy to move plyometricly without lots of practice and muscle development. But having a look and analysing the mechanics is a good start. These animations don't give justice to demonstrating fluid Plyometrics but hay you cant do that with photo's either. But it does show a basic method of moving around an opponent finding points to strike.
With many more years of practicing I am sure I will get somewhere with this-developing approach to body movement. It's easy to look at others and see how good or bad they move plyometricly, but no so easy to watch yourself. So in the future I would like to do a video reference to analyse my progression, something only others get to see of you.
PLYOMETRIC DRILL EXERCISES
Rhythm Hop Jog
This exercise is basically a slow jog, except that every time a foot contacts the ground, you leap off it as quickly as possible. The hop jog is distinctly different for speed and power plyo's. Perform hop jog plyo's slowly in both speed and power fashion until you feel comfortable with both techniques. With rhythm plyo's, do not strive for speed or power. Your goal is to execute the exercise in a smooth, coordinated and rhythmic fashion. These should be performed as a warm up before speed and power plyo's.
Power Hop Jog Plyometrics
First perform rhythm plyo's to ensure that you are fully warmed up. When ready to begin with power hop jogs, start from a very slow jog. After three or four steps, hop off the right foot as high as possible. When the left foot contacts the ground, reduce the amount of time that it is in contact with the ground as much as you can. Spring off the left foot explosively, attaining as much height as you can. Continue until each leg has made eight to ten hops. The two important factors are height (determining the amount of force your muscles must quickly generate) and the length of time that the foot is in contact with the ground.
Speed Hop Jog Plyometrics
First conduct the exercise in the rhythm mode until fully accustomed to it and as a warm up before each plyometric workout. Speed hop jog plyo's are the same as the power ply'o exercise described above except that it has only one emphasis, speed. The height attained is not important. The length of time that the foot is in contact with the ground is of utmost importance. If you hop too high, you will not be able to spring off the ground fast enough to stimulate the neuromuscular system to adapt.
When performed properly, this exercise feels more like a skip than a hop. Since hopping up slows the muscular contractions down too much, it is necessary to hop forward. If the right foot is driving off the ground, the left leg swings forward, almost straight. When the left leg contacts the ground, it drives forward with a strong pulling action of the hamstring muscles. In this method, the foot is in contact with the ground for only a small fraction of a second.
Two-Legged Speed Hops
The basic movement of the two-legged hop plyo's is the broad jump, performed repeatedly. For two-legged speed hops, this exercise is the same as the standard broad jump except that all movements are kept short and quick. The legs do not bend much and the arms do not have time to swing fully. Hop forward ten times, each time making sure that the feet are in contact with the ground for as little time as possible. Attaining approximately a two-foot distance while not bending the legs much should help you avoid having too long of a muscular contraction. This provides sufficient stimulus for adaptation. Attaining more distance frequently leads to losing your balance.
Two-Legged Power Hops
Two-legged power hops require that you drive up as much as possible, only moving forward about 18 to 24 inches. Compared to two-legged speed hops, the knees bend considerably more, the arms drive up much more, and the legs handle considerably more force. Think of two-legged power hops as a kangaroo hopping at full speed and two-legged speed hops as your attempt to hop across a hot lava field without burning your bare feet.
If this exercise feels awkward, try performing the same exercise on one leg. Use the same principles outlined above for both speed and power one-legged hops. Unlike the hop jog, there is no changing of legs. The same leg that begins the exercise continues for the set of eight to ten repetitions.
Box/Platform Hops
Another more advanced exercise is to jump off a one or two foot high platform. This should only be done on a soft surface as this exercise can be especially hard on the knees and back. Jump off a chair or other platform, landing on both legs. For speed plyo's, do not jump off anything over 18 inches and do not jump upward when you take off from the platform. Jump straight out so that you do not fall from a height greater than 18 inches. Of course, the instant your feet hit the ground, explode back up. You can immediately follow up with a second two-legged hop if desired. For power plyo's, you can jump off a slightly higher platform or jump up a little. Or you can land with the knees bent a little more.
CONCLUSION
To conclude Plyometrics, which in many cases can be an overseen issue as a basic requirement for martial arts. It has become apparent to me, the effectiveness Plyometrics make, to any techniques or combinations performed in karate, when performed in a plyometric way. Over the past 12 months before putting this page together, I have noticed in training the difference between using and not using Plyometrics in karate. It takes along time to get the feel of what Plyometrics actually is, but once you feel it, it feels different!
Sensei Dave Hague and Sensei Dave Hook have regularly been running training sessions for the higher grades, practising using plyometric motion. This has been a great experience to practice and see the difference, not only in our training but from video references of Sunday workshop sessions where other Kissaki clubs come together. Its made a big personal difference to me in Dave Hague's Cardio Karate sessions which I thoroughly enjoy, working out plyometricly makes it much easier to perform.