- Skating
- Skating Step Turns
- Basic Dynamics
- Foot Forward Technique
- Sideslipping
Skating
Skiing is just disguised skating. The main difference is the skis are wide and have two edges. When diverging the skis outwards at the tips into a skating stance the skis want to flatten on the snow and the stiff shaft of the ski boots will pull the knees outward. The adductor muscles need to be engaged to hold the skis on their inside edges. This is a pattern of muscle use – the adductors of both legs contracting – that should be maintained when skiing parallel.
Skis diverging yet holding the adductor muscles active on both legs.
To skate more efficiently – fall forward and let gravity generate the forward propulsion.
The key to skiing is being aware of the motion of the centre of mass due to skating and gravity.
Skating Step turns
Now proper skating step turns! Incrementally moving the centre of mass inwards.
The skating step turns lead direct to parallel turns when the inside ski is simply not lifted off the snow.
Basic Dynamics
- Skis must be travelling forward – like a bicycle
- This is mainly about using the outside leg (start of new turn) to push the centre of mass into the centre of the new turn – for the whole duration of the turn
- There is no “balance” when skiing – dynamics is the physics of disequilibrium
- You are looking for stability from organised accelerations (ski technology!)
- Notice in the photos below the outside leg is essentially straight in a skating action (flexion for absorption and other purposes is primarily at the hip joint)
- The centre of mass goes down toward the snow – and to complete the turn it comes back up – like a motorbike in a turn
- There is no “Centrifugal Force” acting on the skier – only a deflection inward away from a straight line. This deflection is used to lift the skier up at the end of the turn – which involves “finishing” the turn – I.E. turning almost back up the hill.
- Remain square to the skis (follow the skis around the turn with your body) until you are really comfortable with movement of the centre of mass and clearly aware of moving it.
Foot Forward Technique
Enabling Thibault to be safe on steeper slopes on the first morning we introduced “Foot Forward Technique”… This gives security through the start of a turn on steep terrain.
Pushing the outside (uphill initially) foot forward during the turn. The foot never gets in front of the other foot – it just tightens the turn instead.
The exercise is practised with skis off and standing in ski boots. For this static exercise we use ski pole support with the body faced downhill with the uphill foot pointing across the hill and the downhill foot pointing downhill and the heel jammed into the snow. The uphill boot is pulled over onto its inside edge and pushed forwards in a natural arc.
Here is some video of exactly the same action in ice hockey training. In skiing the overall direction of travel would be straight downhill instead of straight ahead on the flat ice.
Sideslipping
The main practical purpose of sideslipping is to get down the mountain without picking up speed. Many learners are deprived of this skill because it is generally undervalued and has become even more neglected due to the complete domination of carving skis. Wider skis are easier for sideslipping in a greater range of conditions. Parabolic skis have some trouble gripping on ice during a sideslip, but modern “double rocker” off-piste skis give a smooth and grippy sideslip in just about every condition, including ice. I currently highly recommend the K2 Kung Fujas as a great all mountain ski. (…old tech now!)
The skis are kept on edge by the lateral stiffness of the ski boot shafts. Skis over 100mm wide underfoot begin to create problems on hard snow due to the extra leverage from the edge through the shaft of the boot. Those skis can be very unpleasant on-piste and it’s one limit of how an “all round” ski can be defined. Anything wider than 100mm is not “all round”. In ski teaching the sideslip serves specifically for developing fall-line skiing. Fall-line skiing is where the skier’s body travels directly downhill and not across the hill. This would apply to bumps, steep off-piste such as couloirs and deep powder snow. Slalom is not “fall-line” skiing. The skier should be able to sideslip on either ski or both at the same time. It’s normal to start off with both skis on the snow, skis parallel and with the majority of weight on the lower ski just to get a feel for it. The stance is normally quite narrow to prevent the uphill ski from catching the lower edge. Most beginners have trouble keeping the skis close together.
It should be noticed that only the uphill edges of the skis are in contact with the snow so the downhill edges are in the air. If the fronts of the skis are pushed downhill (Joystick Control – moving the Centre of Mass forward) then there will be no resistance from the downhill edges and so the skier goes into a forward diagonal sideslip. Likewise if the tails are pushed downwards during the sideslip then it turns into a backwards diagonal sideslip. Being able to alternate between straight down the fall-line and the two diagonals is a precursor to the skill necessary for pivoting in the fall-line. Both legs need to squeeze the adductor muscles together – holding the upper legs close together. Pulling both legs together keeps a narrow stance and when the skier practices sideslipping on one leg it ensures the that the geometry of the edge angles to the slope are optimum for pivoting.