Jodan Age Uke is like Gedan Barai an "arrested" block.
That is with a kime in contact with the opponent. Jodan Age Uke is used to deflect a direct frontal attack (ex: Tsuki Jodan) or to stop an attack from above (eg Tetsui Otoshi to the skull).
Jodan means top, Age means up et Week means blocking, Jodan Age Uke so is a blockage up. Some say only Age Uke, for backward blocking. In fact, we block with the forearm while passing in front of the face to protect him. The uninitiated eye will see Jodan Age Uke just the forearm that goes up. In fact, it is often done this way and it is a mistake. Indeed, as we will see in the detailed decomposition, the rise of the arm must be coupled to a rotation of the forearm for a good lock of the shoulder and therefore, greater efficiency.
Decomposition of Jodan Age Uke:
To start we will leave the position Hachiji dachi. In a first phaseyou raise both arms in front of you at the same time. The arm that does not do the technique is placed above the head palm turned forward, while the other, the one doing Jodan Age Uke, goes up to the level of the belly as to make Ura Zuki but shifted beyond the central axis palm turned upwards. Once your right fist reaches your chest (and not before!), your palm is always turned to the sky to the maximum (it's very important!). For the second phaseyou will raise your forearm by turning it to end the arm above the head, palm facing forward. At the same time, you pull the opposite arm down and back in Ikity at the hip, palm up. The two arms cross each other in front of the face. Both phases are at the same timethere is no stop in the middle. Both arms leave and arrive at the same time.
Why do not you turn your forearm too early?
Because you would lose all the effectiveness of Jodan Age Uke. Indeed if at the time of the rise of the arm your palm is turned towards the ground (or worse towards the front), only the deltoids (muscles elevator at the level of the shoulder) will be used to raise the arm. Whereas if you keep your palm up and you turn the forearm only at the end of the movement, this rotation (whipped movement) will be added to the elevation force of the arm.
In addition the rotation of the forearm coupled to the elevation of the arm, causes a contraction of the internal rotator muscles of the shoulder. This contraction, essential for the stability of the shoulder, should intervene at the end of the technique otherwise it will simply slow down the elevation of the arm. This contraction must be synchronized with the contraction of the backbones thus keeping the shoulder down at the time of the final kime. The arm and the shoulder must remain relaxed during the technique to gain speed of execution and therefore efficiency.
As Choku Zukithe movement does not start from the arm itself, but from the belly (Hara). The energy of the belly will trigger a vivid hip rotation (vibration) which, coupled with a strong contraction of the back muscles, will initiate the raising movement (+ rotation ;-)) of the arm and the Ikite return of the opposite arm.
At the moment of impact, the back and the head remain straight. As we have seen, you contract the muscles under the armpits to lock the shoulders that will have to collect the energy of the shock. We also contract the back muscles that will transmit the energy of the hara to the arm. Imagine the Hara (2 3 cm below the navel) as an internal energy ready to explode. It is felt by contracting slightly the transverse muscle (deep abdominal muscle) and the perineum (pelvic floor). At the moment of the "explosion" of the internal energy, the muscles of the back being contracted, "Bouncy" energy on the back as on a wall to spread in the striking arm.
As usual, I prepared you a video where I take in details Jodan Age Uke, with practical exercises to train you. Enjoy in it lasts 20 minutes.
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(Do not forget to warm up before, thanks to the advice I give you in the ABCs of warming up , my book to download for free ;-))
Here, hoping that this video of Jodan Age Uke will help you in understanding this defense technique.
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