A low, aerodynamically efficient squatting position in which the body is parallel to the sides and the arms are kept in close to the body. Used in speed events to reduce wind resistance and maximize velocity.
A diving position in which the body is bent at the waist and knees, with the thighs drawn tightly to the chest and the heels pulled close to the buttocks. The legs should be kept together and the toes pointed..
A riding position with the head and torso low, back flat, and arms close to the body, for best aerodynamics and maximum speed. Most riders will get into a tuck position on a very steep descent to save energy and increase speed.
Tuck is a portable, lossless data compression tool based on the Burrows-Wheeler transform, thus ensuring good compression rates. It currently runs quite slowly , mainly because of the block-sorting algorithms involved.