■ When initiating a turn, quickly rotate your hips in the direction of the turn and see what it does for turn shape and size.
■ While riding on nearly flat terrain, twist the upper and lower body quickly against each another and do a quick hop once they are fully twisted.
■ While standing still with both feet attached to the board, make circles of various sizes with your lead knee. Ten try the same task with your switch lead knee.
TWIST Twist is the act of applying a torsion force that changes the amount of edge angle and pressure along the length of the snowboard. Wringing out a washcloth is a good example of twisting; you can wring it out by twisting the two ends in opposite directions or you can twist one side of the cloth separately. Both are effective, yet more moisture will be released quicker when you twist the two ends in opposite directions. Twisting the board can be an active movement or a result of ineffective movements. Active movements would mean that the rider intends to create that performance at a specific time, with a specific intensity, and for a specific duration. In the other instance, board twist is a result of being out of balance or out of rhythm. Specific movements that can increase or decrease the board performance of twist:
■ Ankles: Flex or extend the lead ankle while flexing or extending the rear foot in the opposite direction.
■ Ankles: On the toes, maintain fixed rear-ankle flexion while extending the lead ankle. On the heels, maintain rear-ankle flexion while increasing lead-ankle flexion.
■ Knees: Flex or extend the lead knee while flexing or extending the rear foot in the opposite lateral direction.
■ Knees: Maintain the amount of flexion of the rear knee while extending or flexing the lead knee.
■ Hips: Rotate the pelvis, which is actually a combination of oppositional knee flexion and extension, and twist the spine.
While making turns at higher speeds, twist can be seen in the tracks left in the snow: the edges between the finish of one turn and the initiation of another turn overlap. Te old edge is engaged in the snow as the new edge is becoming engaged, due to the active twisting of the board that starts the turn. When this happens, the board’s deck either twists slightly or a great deal, depending on its torsional rigidity. Bear in mind that at higher speeds the timing is so quick that it’s hard to differentiate between twist and a slight difference in pressure distribution. For riders new to turning or not moving at higher speeds, the overlap will not be as apparent. Active twist is best accomplished when the rider starts with weight equally distributed over both feet (balanced). Active twist is used in two main instances. Te first involves moving the ankles or knees (or both) in opposite directions while transitioning from one turn to the next. In this case, the joints used depend on whether the legs are flexing, extending, or remaining the same length. If the legs are lengthening at edge change (i.e., up unweighting) the ankles are more effective for twisting the board. If the legs are shortening (i.e., down unweighting), or there is no vertical movement at edge change, both the ankles and knees can be used to effectively twist the board.
TheSnowPros.org CHAPTER 3: BOARD PERFORMANCE CONCEPTS 51
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