cardinal planes
Imaginary boundaries dividing the body into anatomical sections, representing dynamic planes of motion. See also planes of motion.
cartilage
Tough, elastic tissue that provides a cushion between bones.
carving, carved turns, dynamic turns
To make turns with minimal skidding by tipping the snowboard on edge and allowing the shape of the board to cre- ate a turn with minimal lateral slipping or skidding. Carved turns display clean, long arcs in the snow as the entire edge of the snowboard passes through the same point in the snow. A skidded turn, by contrast, utilizes more muscular rotary movements to cause the snow- board to turn.
catcher’s mitt
A terrain-based-teaching feature consisting of a pile of snow usually placed at the bottom of a beginner area to naturally stop a rider from going any farther down the hill.
cause-and-effect relationships An element of movement analysis in which the instructor evaluates the cause or origin of an action and its effect or result.
cement
Uncompacted, heavy snow, with high moisture content.
center of mass (CM)
The point at which the entire mass of the body may be considered to be con- centrated. If the body is viewed as made up of many small elements of mass, the average location of these elemental masses is the CM. The CM location changes as body position changes and may even be located outside the body.
centrifugal force
An outward-pushing force, felt by riders while moving in a circular motion (i.e., the arc of a turn). However, there is no real outward force acting, and cen- trifugal force is therefore known as a fictitious force.
centripetal force
A force on an object whose net direction is toward the center of a circle. In a turn, the lateral (sideways) force of the snow pushes against the edged skis or snowboard, parallel to the snow surface, and makes turning possible.
certainty
The second element of the SCARF model, which offers guidance for assessing a student’s unconscious motivation. The SCARF acronym stands for status, certainty, autonomy, related- ness, and fairness
chatter
Vibration; a rapid, repeated bite and release of an edge; or mindless patter.
check for understanding A component of the Teaching Cycle, in which the instructor determines whether students understand a task, exercise, or concept.
circumduction
A complex movement that allows a moving body or limb to trace an imaginary circle.
clean
Describes a maneuver performed successfully, accurately, and with style; or to achieve this result.
closed (versus open)
A closed turn crosses the fall line, an open turn does not.
cognitive
Of or pertaining to the mental processes of perception, memory, judgment, and reasoning.
command style
A form of direct instruction that defines parameters for drills or exercises.
competition
Competitive events, e.g., extreme, half- pipe, big air, ski- or snowboard cross, bumps, slopestyle slalom, giant slalom, super G and downhill.
coordination
The harmonious functioning of muscles to execute movements.
coping
The top edge of a halfpipe; see also vert. core
A frame of anatomical reference for the body minus the legs and arms. The major muscles of the core reside in the area of the belly and the mid and lower back (not the shoulders), and peripherally include the hips, shoulders and neck.
core material
Most snowboard cores are made of strips of laminated hardwood like beech, birch, aspen, bamboo, or a mixture of them. Wood is used as it gives a lively feel with good vibration damping, it keeps its shape well, and has less resonance than foam or plastic. There are many other materials that can also be used in the core.
complex
A component of the Motor Learning Cycle, in which riders build upon the skills learned in static and simple exercises by practicing the movement at a non-threatening speed, on comfort- able terrain.
concentric tension
In this type of tension, the muscle actively flexes and the fibers shorten (contract) to overcome opposing forces, and move the joint.
concentric vs. eccentric exercise Concentric exercise is the muscle contraction when a weight is lifted. Eccentric exercise is when the muscle fibers lengthen to lower weight, like the downward movement of a bicep curl.
connective tissue
The tissue that functions to support, connect, or separate bodily tissues and organs; includes tendons and ligaments.
control/control phase
The middle part of a turn, in which the snowboard is guided into and out of the fall line, and where most steering occurs and the rider accelerates
134 AASI SNOWBOARD TECHNICAL MANUAL
TheSnowPros.org
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58 |
Page 59 |
Page 60 |
Page 61 |
Page 62 |
Page 63 |
Page 64 |
Page 65 |
Page 66 |
Page 67 |
Page 68 |
Page 69 |
Page 70 |
Page 71 |
Page 72 |
Page 73 |
Page 74 |
Page 75 |
Page 76 |
Page 77 |
Page 78 |
Page 79 |
Page 80 |
Page 81 |
Page 82 |
Page 83 |
Page 84 |
Page 85 |
Page 86 |
Page 87 |
Page 88 |
Page 89 |
Page 90 |
Page 91 |
Page 92 |
Page 93 |
Page 94 |
Page 95 |
Page 96 |
Page 97 |
Page 98 |
Page 99 |
Page 100 |
Page 101 |
Page 102 |
Page 103 |
Page 104 |
Page 105 |
Page 106 |
Page 107 |
Page 108 |
Page 109 |
Page 110 |
Page 111 |
Page 112 |
Page 113 |
Page 114 |
Page 115 |
Page 116 |
Page 117 |
Page 118 |
Page 119 |
Page 120 |
Page 121 |
Page 122 |
Page 123 |
Page 124 |
Page 125 |
Page 126 |
Page 127 |
Page 128 |
Page 129 |
Page 130 |
Page 131 |
Page 132 |
Page 133 |
Page 134 |
Page 135 |
Page 136 |
Page 137 |
Page 138 |
Page 139 |
Page 140 |
Page 141 |
Page 142 |
Page 143 |
Page 144 |
Page 145 |
Page 146 |
Page 147 |
Page 148 |
Page 149 |
Page 150 |
Page 151 |
Page 152