andyjeffries
Senior Master
Interesting so I want to know more. There is a chance as you mentioned that when performing a round kick like peet chagui you can meet an elbow and this is very painful, bit this can occur with a peet chagui or dolyo chagui both of them aimed to the stomach/torso area. Why you wrote that only with peet chagui and not dolyo, can you be more specific? in both cases peet/dolyo chagui the instep is the part of the foot used to make contact no matter ribs for example or elbow.
The difference is that a 45 degree kick can impact the point of the elbow kicking upward which is very solid and has the length of the upper arm reinforcing it (along the line of travel).
The 90 degree roundhouse if it hits the elbow it hits the side of it, pushing the elbow in to the ribs. There's not the immediate stopping impact, but a cushioning effect and you're not hitting the point of the elbow.
That's why there's a much lower risk of injury to the instep...