I used to do my lift and twist my arm clockwise before bringing the pistol back down onto target. This locks your elbow.
Try it. Point your arm straight out in front of you and look at your elbow joint. Now rotate your arm to the right (uf you are a righty) and now bring your wrist back round to firing position. You'll notice your elbow joint stays round to the right!
I found this made a difference when shooting prolonged sessions