I try real hard to keep my knees locked out in various skills (handstand kick ups, v-ups, l-sits, etc) but a lot of the times when I record myself, I notice I seem to be just SLIGHTLY bent. This also occurs in longer pike stretches and the like, too - my knees seem to unlock ever so slightly.
So aside from "just try harder" are there any tricks to ensuring your knees stay locked? Is there some specific flexibility I should be working on?
