what is "jamming the hip?

[Roy]

I have seen this term used around the site and I don't quite understand it or how it happens in someones throwing motion. Usually in the context that it is takes away distance when you do it.

Can anyone elaborate?

[Star Shark]

Generally, this is when you don't rotate your foot (whether it's a toe or heel pivot) at the rip. Your leg is locked in one position as you rotate the rest of your body, thus jamming the hip.

[JR]

Stand still both feet planted with the whole sole and turn as far right as you can without raising any part of the soles. Look at your thigh/hip joint and try to move right. You shouldn't be able to because the motion range is topped by the bones in the hip and the leg. IF you plant too short or too far off the line you're moving on you may end up in this position where there won't be any more hip motion to the right until the shoe sole rotates. It might not if you've planted flat footed or there are stones etc. restricting the rotation of the foot. RHBH hip joint locking up usually means not turning enough toward the target missing left and possibly falling on your nose. At least tripping or bending forward from the waist way too far often leading to worm burners.