BASI Resources 2015 Congress

Interski for Snowboard

Form based to Skills based On Snow Workshop

BASI Interski On Snow workshop – Form to Skill Based from Official BASI on Vimeo.


INTERSKI 2015 On Snow Workshop- Rupert Goldring, Lynn Sharp Mill.

BUMPS AND BASI: Using bump skiing as a salient example, this workshop aims to show you how at BASI we look to evaluate and develop skiers, whether clients or students, using the performance threads.

Bumps within the BASI pathway have always held importance, more than many national alliances. Already at Alpine Level 2, candidates are expected to ski fall-line bumps with competency. By Alpine Level 4, candidates need to perform a variety of turn shape, at a continuous speed, on black bumps. This is probably a reflection on our heritage skiing our home mountains. The Highlands may lack wide-open groomers and endless vertical. They do not lack short steeps, where bumps form before the car park is full. To ski in Scotland is to bed the White Lady on Cairngorm, or shoot the Tiger on Glenshee.

BASI’s relationship with bumps, however, is not a mawkish one. We use bump skiing not only for it’s own sake, but as a means to explore the performance threads. No other strand so immediately pulls together the requisites of equipment, environment, physicality, psychology, tactics, and technique. Simply, bumps focus the attention like little else: technique is useless without a workable line on appropriate terrain, a worthy pair of legs atop suitable skis, and a well-built head. 


Discuss what may be deemed appropriate skis for effective bumps skiing. Wide skis may affect the rate of edge change, or the ability to adjust stance width. Long skis will limit the space in which to rotate. You may even talk about base-bevelling to aid rotation. Given that we are not in a position to change skis, (and in the real world of clients you rarely would) consider how we might adjust tactics or technique apposite to someone’s equipment.

Boots, too, may be mentioned. I, for one, can absorb the terrain only through my vertebral cartilage in stiff plug boots, hence I’m now really short. Again, what adjustments to tactics might we consider?

Poles can even be an issue. Were time on our side, skiers could swap poles with each other to something bigger or smaller in order to highlight how this alone might affect an evaluation and development of the skier.


What bumps do we have? Is there a bumps field? Will we have to make our own? If we are forced to make lines, make a variety to reflect the variety of tactics available.

Is our task appropriate to the environment? For example have we a line of truncated bumps though we are asking for a demonstration of an inside line? Are the bumps wildly offset though we are working on a direct line? If there is a discrepancy, accept how that would change evaluation and development of skier.


Time limitation will mean we will not be able to explore visualisation and attention-focus skills beyond a mere vignette. (Our group may wish to share their ideas at the end). We should talk about the pathway from easy to hard in terms of choice of tactics, where the skier is able to ski an inside line first to feel that they are in control, moving to an outside line then direct line as they feel more confident.


Again limited time will mean that notions of core strength, flexibility, agility, muscular resistance are paid only lip service. Using line choice to complement a skier’s physicality should be our major aim.


A task could be: ski the bumps fast at start, slow in middle, fast at bottom. This will act as a prelude to the 3 lines we present in BASI, hopefully with the group imparting that information. For example, to ski fast skiers are likely to adopt outside or direct, and inside line to slow down.

Now may be a good time to explain and demo the 3 lines, while emphasising that they are merely tools to develop pragmatic decision-making and not mutually exclusive.

Inside Line.

The skier turns high on the bump inside the main trough and uses the back-side of the bumps as an opportunity to skid. This line offers more opportunity than any other to control speed and presents a fine initiation into fall-line bump skiing. It is appropriate to Level 2.

Equipment: hard to achieve with really long skis in a rut line.

Environment: appropriate for demanding conditions.

Physicality and Psychology: less engaging.

Outside Line.

The skis and COM diverge with the skis following the outside camber of the rut, rather than descending the back of the bump, so presenting more of a piste-performance short turn. With a rounder line the skier is able to avoid the deepest part of the trough making it less physically impacting and psychologically daunting.  It is appropriate for equipment more suited to piste performance.

Direct Line.

This offers the fastest descent down the hill, predominately using pressure management to control speed, where the timing of flexion and extension matches terrain and enables a quick check on the face of the bump without affecting the overall speed of descent. Physically demanding. Psychologically engaging.

Given the context, there will be skiers able to perform all lines with ease. Develop task: push skiers away from their default line without changing speed of descent; encourage variation (3 direct, 3 outside); encourage jumps from line to line (old school tricks?). Ultimately it may be relevant here to explore the technical thread.


I have included some generalisations using the steering elements as titles from which to elaborate.


While the skis and COM diverge, especially when skiing an outside line, the skis are tilted in proportion to the burm rather than being positively engaged: pressure comes more through the base rather than the edges; this can be achieved by limiting, while not neglecting, lateral separation.


High rate required, through narrowing stance and recruiting rotational separation. An early pole plant, at the end of the old turn, anchors the torso in a position of rotational separation (and helps disinherit any balance issues from that turn).

An inside or rounded line may require greater range of rotation, including the hips. A lead between skis can allow for this without forsaking a narrow stance.

Pressure Control

The skier needs to find a balance between absorbing the bump and deliberate muscular resistance to slow the skier’s progress. The skier may wish to use a narrower stance to allow the check to dissipate through both legs equally.

The skier may require a straighter back to allow for maximum vertical travel and allow the feet to come up in front of the hips.

For-aft balance becomes important so the COM remains balanced to the skis on the bumps rather than the general slope, for instance dropping the tips of the skis after the turn. It is faster and more accurate to adjust the skis accordingly rather than the COM. 


 If there is time, or if there are limited bumps, we can present bump skiing as a pathway to develop other strands.

Piste Performance.


Skiing at constant speed.

As the speed builds up and the skier uses less skid, particularly when executing outside line, he develops his decision-making, where to finish the arc according to the speed he wishes to carry into the new turn.


Develops effective blend of rotation, whether steering ski along its length, or distributing rotation within the turn.

Develops good pressure management and effective transitions. Bumps, as short turns, can see too much pressure built up at end of turn; in both, if the skier presses too hard on the skis he can only create a force for a short duration, exacerbated in bumps, which is hard to control. Skiing bumps develops lower transitions so developing faster edge change, less unnecessary vertical movements, extraneous to movements on lateral plane.


Develops separation both laterally and rotationally, required to exit the turn quickly.

Develops positive pole plant, desirable for timing and support, while the extra contact with the ground helps affect rotation of the skis yet anchors rotation of upper body.



Accurate checking so as not to accelerate uncontrollably while not affecting flow: the body should continue to flow down the hill, facilitating the next edge change.


As in bumps the skier needs to limit edge angle so the skis do not grip and accelerate more than desired.

Any increase in descent speed with a subsequent deceleration will increase the amount of pressure in the system. The skier must therefore be prepared to make moves that will manage pressure loading as smoothly as possible- a greater range of flexion and extension.

Accurate rotation of the skis while limiting rotation of torso.


Positive pole plant, to help anchor the shoulders and develop agility.


Both bumps and steeps can be intimidating. Instinct can often cause the skier to lean back or over rotate the torso into the hill. Working on bumps will help steeps and vice versa, to overcome fear.



Fore-aft balance: as in bumps the skier needs to develop the ability to move the COM backwards so the skis do not submarine, or forwards to retain a posture which is better aligned and stronger; as we mentioned, moving the skis fore and aft is a more accurate means to achieve this.


Feet closer together, which will help the skier spread weight between the 2 skis.


To cope with all the adjustments necessary during a descent, it helps to be strong in the core. A weak middle means the extremities are more likely to be out of control. 


Hopefully this workshop has highlighted the worth of bumps and explains why BASI hold bumps in such high regard. As with skiing any strand, there is not one way to ski or coach bumps. By embracing the performance threads, where technique is a mere element, a coach can develop a rounded and pragmatic skier, able to react and make decisions at will. In the real world of real clients, the performance threads can make for an inclusive lesson of disparate skiers.



The 3 Demos


TIED Model Presentation – Paul Garner, Becci Malthouse & Giles Lewis – 10 Sept Interski 2015

Becci & Paul HQ

Interski 2015 Demo Day

What can a BASI Instructor offer the world’s snowsports market by Jas Bruce and Craig Robinson

Capture 1

IVSS Keynote lecture by Dave Renouf and Jutta Hannig

Day one of training in Ushuaia

BASI’s Demonstration Team Interski 2015

BASI's Demo Team for Interski 2015

BASI’s Demo Team for Interski 2015


BASI’s Workshops Interski 2015

BASI's Workshop Programme for Interski 2015

BASI’s Workshop Programme for Interski 2015



Our Disciplines

The History of BASI

Skiing Central Theme

Snowboard Central Theme