PSIA (PSIA-AASI)
The acronym for the Professional Ski Instructors of America, which, with the American Association of Snowboard Instructors forms PSIA-AASI, a non- profit education association of 31,700 snowsports professionals dedicated to creating life-changing experiences for others through snowsports instruction.
p-tex
A type of polyethylene plastic used as base material for skis and snowboards.
pump/pumping
To drive a board or skis by extending then flexing the legs while riding on a clean edge. Used when riding through a transition in a halfpipe to accelerate and/or control pressure buildup.
Q-angle
The angle between the extended axes of the femur and the tibia, measured at mid-patella (kneecap). The angle is typically larger for women than men because women often have a relatively wider pelvis.
quarterpipe
A feature with the shape of one of the two walls of a halfpipe.
quiver
A snowboarder’s collection of boards, each of which is generally geared toward specific terrain, conditions, or riding preferences.
rail
A non-snow feature, usually with a metal or plastic sliding surface. Rails come in many sizes and designs and differ from boxes in that they have legs rather than enclosed sides.
ramp
A natural or manmade jump. range of motion
The distance a joint can articulate along its planes of motion.
rate The speed of a given movement. retention plate
A metal or fiberglass plate inside a deck that helps hold binding screws.
relatedness
The fourth element of the SCARF model, which offers guidance for assessing a student’s unconscious motivation. The acronym stands for status, certainty, autonomy, relatedness, and fairness
reciprocal (small group) A type of indirect instruction in which students help each other learn a new task.
reference alignments
Three descriptions to assist instructors with discussing movements and posi- tions: shoulders and hips are parallel to the slope/terrain, center of mass is over the working edge with a rider’s weight equally distributed between the feet, and shoulders and hips are perpendicular to the front foot.
regular foot
A directional stance in which the left foot is the front foot; see also goofy foot.
reinforcement
The process of rewarding students for appropriate performance. Recognizing and praising students for reaching their achievements boosts their motivation.
rocker
The shape or design of a ski or snow- board with reverse camber throughout part or all of the tool. Three general categories of rocker include tip rocker/ early rise, tip and tail rocker, and full rocker.
roller
A wave-like terrain feature with rounded mounds of snow that have been groomed smooth. Also known as a knoll.
rotary movements
Movements that increase, limit, or decrease rotation of the snowboard.
Riglet Park
A terrain-based teaching area for young children to learn snowboarding, emphasizing safety and learning in a playground-like setting.
risk management
The act of limiting or reducing danger to employees and students.
Riding Model
A representation of modern snowboard- ing; the AASI reference for identifying riding style and performance. See also Y Model.
reactive
Acting in response to an event or circumstance.
real vs. ideal
A comparison of student performance (real) with performance that would optimal (ideal) for a given task.
rear foot
The foot nearest the tail of the snow- board.
rebound
The recoil or springing back of a decam- bered snowboard. When a rider bends the snowboard through the turn (i.e., decambering) and then releases the pressure and forces, the snowboard can rebound and create a snappy linkage from turn to turn.
retraction
Pulling the legs up under the body (active retraction) or allowing the terrain to push the legs up under the body (passive retraction), which momentarily reduces pressure.
reverse camber
The opposite of camber, this term describes a snowboard bowed or bent at its midsection, with its base arching downward.
revert
A 180 at the end of a turn that enables the rider to exit the turn riding switch.
riding concepts
AASI’s reference concepts for identifying and describing the technical aspects of movement and snowboard performance.
142 AASI SNOWBOARD TECHNICAL MANUAL
TheSnowPros.org
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