Whats the problem with fighting open handed, and actully using your hands and wrists to disrupt the path of a punch?
Wouldn't it be easier just not to get caught up a combo, always staying light on your feet and learning reaction time to move away and counter would be better then stressing out about getting knocked out by a hard hitter?
Please read what I posted in the link. Here it is again
. In fact, I think I cover that thoroughly in that thread as a whole.
But to answer your first question, I believe you actually already know the answer. You see, the problem with blocking in general is that it is
better to not get caught in a combo, stay light on your feet and move away to counter than it is to block, whether it be open handed, closed fisted, with your wrist, forearm, shin or shoulder, or by using the referee. The problem with blocking is that you are putting a part of your anatomy in the way as a barrier to receive damage and force instead of your vitals. Even if your aren't hit in a vital spot, you are still receiving and absorbing the force into some part of your body.
What ends up happening is that you end up with accumulative damage to the limbs that you otherwise would be using attacking your opponent. This will end up making you arm/leg weary and take a lot out of you over time. Rocky Marciano was known to beat up his opponents' arms and shoulders if he didn't have a clean shot to their head or body. What ended up happening is that they wouldn't be able to move their arms in the later rounds (whether it be defending or attacking) and he would would have a much easier time fighting (and finishing) them. Charles McCarthy folded underneath the repeated impact and force of the salvo of knees he received to his blocking arms by Michael Bisping in their fight. I can safely contend that the same thing would have happened if he was wearing 16oz sparring gloves.
Now, I stated that the "fist on the jaw" is not a block because it is not. Heck, you can put a 22oz sparring glove on your hands, place them at jaw level and ask anyone with any sort of punching skill to punch you in the glove to see if that works. You will probably find that a great deal of the force will continue on through and instead of it feeling like you are being hit with a club, it will instead feel like a 20lb sack of jelly hitting you in the face. What is worst is if they hit you lower on the glove in the cuff area, it will make your wrist fold inward regardless of the amount of tape you have on. You may not feel it at first (if you aren't hit hard enough), but you will feel it as it accumulates. The same process is much quicker when you have grappling gloves. That's the reason why I mentioned wrists. Now that's only taking into account punching, the same applies even more so for the added force and power of kicks.
But yeah, it is better not to be there instead of blocking. In fact, in the grand spectrum of defensive technique blocking should be your last option. The hierarchy of defensive techniques would probably go something like this:
- Interrupt/Faster/Pre-Emptive Attack: Hit them first.
- Dodging/Evasion: Get out of the way.
- Deflect/Catch: Redirect the attack while moving in to attack.
- Cover Up/Blocking: This is the last resort. It is taught first because it is the easiest to learn.