Brooklyn Rican

I don't suggest weaving out of the way from a jab i suggest parrying jabs and moving your head. Parrying you gotta learn not to be fainted with it its mainly used. The peek a boo style is not easily mastered it'll never be used as good as Tyson used it. Stick to the normal defense since you're still learning which is your right hand in front right next to your cheek and your left hand in the back next to your cheek also. Make sure you're angled up too as if you were kick boxing most likely they had the same stance right? Stick to the basics i don't want you to go too ahead of yourself and then just look like a big mess.

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Pork Chop

Muay thai has a very square stance, you don't want to be that square. if 180 degrees means you're in a 100% square stance (no leg forward), and 90 degrees means you're in a completely sideways stance (one leg completely forward), boxing's probably about 135 degrees (legs on a 45 degree angle - or smaller) and muay thai's about 160 degrees (one leg slightly in front).

While I agree that you don't want to be doing any overly complicated head movement if you don't need to, the head movement you use for that body hook i mentioned is going to rely on the guy's angle. if he's firing the jab from outside of your jab, you're going to have to bob down and weave under the shot before you can hit the ribs.

Now if you're outside of his lead and the jab's coming in either dead on or inside of your lead hand, then parrying (down) or slipping to the outside becomes much easier.

If you parry, the next shot i usually use is firing a jab or a (head) hook with the same hand you just parried with, but that takes some practice. The jab will usually slide over the parried arm & is easier for a vertically downward parry. The hook is more off a horizontal lateral parry; the parry will be a bit more of a pop & slight retraction to get the angle for the hook. Both parries are with the palm of your glove; unlike the raising parry I was talking about earlier which either the side of the glove or the forearm. The better your angle the easier it is to parry.