Release

Release Pub

The release and transfer are arguably the most important parts of the turn - as they will set up all the elements for the next turn as well. The purpose of the release is to end the previous turn by basically releasing the edges from the previous turn, whether carving or not.

In general, the release movements start with the ankles to flatten the skis, then knees and hips and so on but sometimes the "COM is released first" i.e. the relaxation of muscles will "release" the upper body before the skis.

At the most basic level, edge release starts in the ankle and progressively moves up the skiers kinetic chain. USSA GS Technique and Tactics

There are a few ways to release the skis, which can be combined with the subtle ankle movements above:

Flexed release
Created by relaxing and shortening the long outside leg. Also sometimes called "down-unweighting" as a category, or more specifically "two-footed release". There are a few variants, given how strong the flexing is or how the transfer is accomplished:
- Retraction release
  It's an extreme case of the Flexed release, where the legs are strongly retracted. Common in bumps and high-performance skiing.
- Flexed or floating release
  Both skis are light in transition, the edges are switched as the skis are tipped. This is the typical application of the flexed release.
- Early release or early transfer
  A flexed release, when transferring weight/balance to the new ski, before it is on the new edges, so transferring to the little toe edge of the old inside ski before it is tipped to the new edge. Also called the one-footed release
- Weighted release or late transfer
  When transferring late to the other ski, still maintaining some weight on the outside ski during the transition.¹
- COM release
  Created when the muscle relaxation/use releases first the upper body while keeping the skis slightly engaged a little while longer. Very similar to the Weighted release.
Extension release
Created by pushing into both or only the outside leg (extending or hinging over an already long outside leg) and hopping "up". Sometimes referred to as "up-unweighting" or "cross-over".

The extension release is most frequently seen in recreational skiing while the others are typical for expert and high-performance skiing and racing.

Energy and speed control

One of the important elements of a release is to extract energy from the turn - this is related to floating.

Some perceive the flexed release as wasting the energy of the turn. That is one of its advantages and why it is used in performance skiing and high-level racing. In high-performance skiing, we generate a lot of energy, as you see in the frames above: even with the strong absorption and the boots still came off the snow.

The energy generated in a turn is in direct relationship to the edge angles at the apex and carving. The energy is highest in a carved turn on the ice at maximum edge angles and lower in skidded turns at low edge angles (the skidding dissipates energy as the snow can't "push back") on soft snow.

Extension releases may be useful in low-energy turns, skidded and pivoted and/or without much edge angles, where little energy is generated in the turn and the skier ads to it with pushing "up".

It is a high-level skill to extract as much energy from the turn, in the desired direction, as needed but not more! This is generally what we refer to as Impulse.

The Speed control with retraction releases is a high-level skill (we cover that at the black levels). Easy speed control is why an extension with skidding is often used on steeper slopes.

The release continuum

There is a large spectrum of releasing, between extension and flexing, between pushing hard on the skis at the end of the turn to throw the body upwards, versus a complete flexing and relaxing of the legs, to allow it to fall downwards. Weight transfer could start late or early as well...

When characterizing a release, we will look for the dominant characteristic. Here is how the types of releases contrast or combine:

release flexed vs extension
transfer: early vs floating vs weighted

Muscle use

Another way to look at this is how the muscles are being used:

isometric contraction is when we use the muscles without changing their length - as in resisting the forces of the turn
eccentric contraction is when the muscles elongate in response to an external force
concentric contraction - this is the typical use of the muscles, where they shorten and create force via leverage

If we resist the forces of the turn with a longer outside leg, we use isometric and perhaps eccentric contractions.

From here, two options are available:

relax and possibly retract, for a flexed release
extend, with concentric contractions, for an "extend to release"
which foot: both, outside, inside or none

Foot use

We can also look at the releases based on how many and which feet are involved. The PMTS system has a good way of cataloguing them:

the "two footed release" - a regular flexed release, with both feet on snow
the "one footed release" - the "early release" or "early transfer"

COM Release

The COM release is sometimes seen in speed skiing. The basic idea is that the body is released before the skis, generally via relaxation of specific muscles. At the same time, the skis are rolled off the edge, but it may result in something resembling an A-frame around the transition.

Extension release

Related to up-unweighting, this is based on a push and/or an extension of the legs, especially the outside leg, which will tend to push the hips and body "up". This will afterwards take the weight off the skis and allow them to end the previous turn. Afterwards means when the pushing is completed, usually around skis flat.

This one is not strictly speaking a release, as there is no specific focus on disengaging the edge from the snow, the skier is just hopping off of the edge, but it is very common, so we'll include it here in the discussion of release mechanisms.

It is an older technique, called "up-unweighting" and usually followed by a pivoting of the skis - while the skis are disconnected from the snow and any rotation efforts or momentums easily affect their rotation.

Typically, the skier, in this case, will flex the outside leg throughout the turn (giving into pressure) and then extend/hop at the end of the turn, to release the edges, hence the name "up-unweighting".

It is very common but less effective, as it usually leads to excessive up and down movements as well as a loss of control (while the hips are "flying" up and down, all you can do is wait for them to come down, to get the pressure back on the skis).

More biomechanical considerations

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