Here is the difference
Originally Posted by GarryZ
Somebody want to explain me the differance between counter and rotary? It would seem to me the body is made to be facing in it's normal state and counter would inevitably add some rotational force just by the stretching of the muscle groups.
Wouldn't the body introduce some rotation through counter , angulating over uneven terrain and the forces applied to your skis in a turn?
I will initially base my reply on arc to arc skiing but the movement patterns described below are the gateway to "drifted" slip in turn entry and all ATS-PSIA shaped turns.
Advancement of the inside half of the body during the PREPARATION phase of a arc must be viewed (and executed) as movements about the bodies central axis. The upper/lower body sepatation concept and execution is NOT the case thus rotary force is not applied to the skis. The body separation is: left side column/shaft versus right side column/shaft.
Outside/Inside half of body- can be thought of as a column or shaft consisting of foot, leg, hip, oblique, shoulder and arm of one side of the body (to the outside or inside of the radius of a turn). For example, this concept allows the stance/lead change from TRANSITION to PREPARATION to be conceptualized and executed. The body has asymmetric movements of its outside and inside half. The adduction/abduction of the legs and the push/pull (extension/flexion) of the hips are two primary examples.
Elements of PREPARATION
1. The edges are engaged, and ready to be energized
2. Ankles are dorsi flexed (bilateral)
3. Parallel boot shafts and legs
4. The outside leg is adducted and the inside leg is abducted
5. Inside hip flexion and outside hip extension
6. Stance change - Upside Down Traverse (UDT) stance- the entire inside half of the body leads the outside half
7. Upper body reflects stance- outside (tip of ski) focus/framing
8. Perpendicular body alignment to the skis
PREPARATION PHASE BODY MOVEMENTS
1. Edges are engaged by adduction of the outside leg and abduction of the inside leg
2. The entire inside half of the body is advanced in relation to outside half - diagonally gated
3. The inside hip is advanced linearly and begins to flex
4. The core remains tight
5. The inside half lead is accomplished by rotary movement about the central (longitudinal) axis of the body. See: Note below.
PREPARATION PHASE ATTRIBUTES
1. Balance is 60% outside foot/40% inside foot
2. Energy (applied parallel to the DOT) is 70% outside ski/30% inside ski
2. Pressure (energy) shifting to outside foot/ski
3. There is a time lag between edging the skis and deflection
4. A change of joint angle in the hips (inside vs. outside) places more energy on the outside ski and less energy on the inside ski
NOTE: The joints of the lower body are stabilized as a result of rotary movement (see: PREPARATION PHASE (body movements#5 ). This is an intrinsic benefit of PREPARATION, and an addition to core tonus. No corresponding rotary force from the stance change is applied to the skis. They receive linear energy only (with one exception, see: "Slip In" Technique).