Presentation on theme: "Subtitle: The chicken and the egg"— Presentation transcript:
1Subtitle: The chicken and the egg Technique and TacticsSubtitle: The chicken and the egg
2Goals of the talk Understand the elements of line and line choices. See and understand examples of good line selection (and not so good ones)Understand how technique relates to tactics.Understand how Your technique relates to Your tactics.
3Definition: ApexNote how she prepares to turn well in advance of the rise line.Rise lineThe apex is the point where pressures on the ski cause the majority of direction change.For most JIII,IV,V races, the apex will occur above the turn.
6Note how closely two racers follow the same line. What’s the difference between you and the winner? Maybe it’s only a matter of a foot on each gateMoral: small differences in line choices can add up.
7Apex Placement Radius of the turn is the same in both cases. Skier on the left has a tighter, shorter lineSkier on the right has a safer, cleaner line.All things being equal 99% of the time the skier on the right will be faster.
8Line Choice The green line is the theoretical optimum, but risky. The maroon line is too tight and leads to skidding below the gate.The purple line is more consistent. Note how it starts above the rise line of the gate.
10Terrain, course set moves the apex Because the course requires so much across-the-hill travel between the blue and red gates, the apex of the “blue turn” is below the gate.You probably won’t see much of this in GS (without an under gate in the middle) in the east because our trails aren’t that wide.This lower line can occur more frequently in speed events.
11The cost of misjudgment Racer skis too straight at the next gate.The price paid for turning too early or going too straight is FAR greater than going too round.Racer skids below the gate, causing friction and slowing him/her down.Why? If you skid, you’ve lost velocity. This will impact your time throughout the rest of the course.If you go a little bit too far (too round), it impacts the time to get through that one turn, but doesn’t decrease your speed through the rest of the course.
12Line depends on pitch Less pitch, you can turn a bit lower. Steeper pitch, you must turn higherSize of arrow indicates steepness of pitch
14Pinching the gate (turning too early) For most of us, coming this far inside will screw up our turn.The panel slows us down when we hit it,it’s hard to carve cleanly around the gate like this, andwe risk getting our hand between the poles and hooking the panel.
15In the late 90’s…USST decided to focus more on technique and less on tactics.About one-third of the tactical issues went awaySource of tactical issues (turning in the wrong place) are either:You don’t know where to turn, orYou can’t turn where you want to, when you want to
16So, back to basics Transitions – the phase between turns Turning phase – when the skis cause you to change direction.
17Transitions: 4 ways1. Set the edges of the ski to make the feet slow down; upper body “topples over” the feet.2. Skis tighten the arc so they “cross under” the upper body/upper body falls to the downhill side of the skis.3. Remove the support of the downhill foot4. Relax key muscles and flex so upper body disengages from feet and its momentum carries it across the feet.
181. Edge SetNote the blocking pole plant. This is a breaking move, so we only do this when we absolutely have to.
192. Skis tighten the arc Transition – upper body crosses feet Solid line: path of skisDashed line: path of upper body
22RetractionAbsorbing the pressure between turns at the moment of transition.Done to a greater degree in Slalom, but is also done in Giant Slalom.Improves the ability to turn quickly by shortening the time it takes for transition.
23Old daysAthletes extended (stood up) in between turns to make it easier to move from one edge to the next.
24New Days Does this athlete stand up in between turns? Why not? Answer: it shortens the time spent in transition.
25What a difference 10 years makes Old way:Flex & extendNew way:retraction
26Another GS exampleLet’s see why shorter transitions are faster.
27Learning RetractionHop back and forth across a pole as fast as you can.Old way: try to hop as high as you canRetraction: try to move your feet back and forth but don’t let your head or upper body move up & down.Better simulation: try retraction on a trampoline (use spotters).
28Too much: hop off the snow; Too late: get launched. OOPS! Remember: our goal is to start the next turn sooner! You can’t turn if you are not contacting the snow.
29Turning phaseLittle or no rotation of the skis to ensure a carve at the top of the turn.ROLL THE ANKLES AND KNEES.Inside ski used primarily during the first half of the turn.Weight goes more to outside ski when:SteepIcyDifficult turn that needs a tighter arc.
30Not so clean Notice rotation of ski right after transition. Note how long the weight remainsCauses skidding. (note snow spray.)Rotation means that it’s harder for skis to carve.50-5050-5070-30 and the outside ski finally hooks up
31Bode carves a clean arc Little rotation. More weight on outside ski earlier in the turn.More weight on outside ski by the gate.Little snow spray.No skidding = fasterLess rotation so inside ski carves at top of turn.Both skis carveAlmost all weight on outside ski
32Side-by-side comparison Problem started way up here when he drifted too low before starting the next turn.Bode has already started his next turn.Moral: too slow in transition starting the turn late skiddingQuestion: why is the turn on the right still impressive? (hint: when is the problem with the line corrected? When would you or I figure out we are low & late and then fix it?)Bonus point: what would have been the other way to “fix” the turn? Further hint: refer back to slide 8
33Two ways to ski a good line Length of gold line is the time it takes to transition.Hold on to your previous turn a bit longer to aim higher on the next gate.Make your transitions faster to start turning earlier.Radius of both turns is the sameMoral: you have to ski the line that matches your ability to transition and carve. Start by skiing higher and work towards faster transitions/lower line.Skier on the left can initiate a turn more quickly so s/he can ski a bit lower line.
34Wrap Up Most turns: apex is above the gate. Too straight a line leads to skidding and braking.Quick transition helps you turn earlier. Retraction helps shorten your transition.You need to select the line that matches the terrain, the course set, and your abilities. When in doubt, see 1st bullet.If you are low & late, it’s better to pivot and skid or ski a rounder line above the next gate or two than to skid and brake below the current gate.