Well no, what I am doing here is the opposite.
Palm heel strikes work but you have to be able to hit hard or they basically do bubkus. This is why Baz Rutten can justify using them. Apart from the pain of getting slapped it relies on hitting hard enough to move the head.
There are positional advantages and all sorts of cool things you can do with them.
But you don't have enough time to create the sort of basic skill set that palm heels will be an advantage.
You are just not going to create the sort of juice needed to make it work. It is nothing like it is being presented to you by the Krav set..I have done them. straight ones, round ones everything. You get a bit of head movement and that is about it. Good for me because I dont want to carve guys faces up and possibly want to throw an intimidation shot out to back a guy off and let him know I am serious.
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But this set up is not for me.
Hammer fists. Great move in all sorts of positional situations. I use them to for set ups and opening up grappling options. But you cant do them well if you are standing in front of someone. You are put at a positional disadvantage if they are throwing straight shots down the pipe. And I am throwing round shots. Unless I have the better footwork.
Are you going to have time to do combative footwork like angling off and striking? and If you are in a position to do hammerfists you pretty much dont have to train it.. Its there.
Your best option if you have a limited time to give a person skills is to give them the ability to throw as many effective strikes as they can in as short amount of time as they can. And that is straight shots down the pipe.
And unfortunately that will require a bit of training to get a persons head around. Because everybody instinctively wants to throw tennis balls.
It is not any sort of set up for decent fighters. It is about best bang for buck under a very short amount of time.
This is the calculator version of self defence.