Technique
Dynamic Bump Absorption
HOW TO DO IT
Dynamic Bump Absorption
Dynamic bump absorption uses available leg movement to accommodate changes in the snow surface. It differs from passively holding a fixed crouch or deliberately jumping every crest.
Preparation and setting
Controlled basic turns; a short visible section of small manageable bumps.
Execution / practice sequence
- Approach in a mobile stance.
- Let the legs flex as the board rises toward the body.
- Allow extension as the surface falls away.
- Keep the next feature and exit in view.
- Recover support before the next demand.
How to learn / practise
Start with one gentle terrain rise, then a short traverse. Add turns only after contact and recovery are deliberate.
Errors and corrections
Rigid legs transfer the terrain disturbance into the torso. Bending only the waist does not provide the same range. Reduce speed and task complexity.
Observable checks
Terrain-following movement preserves controlled contact and a usable next action.
HOW TO DO IT
Dynamic Bump Absorption
Absorption lets the board move over a rise without forcing the entire rider to follow its shape rigidly. The ankles, knees and hips share the movement within the constraints of the boots. The aim is enough available travel to maintain balance, chosen direction and useful snow contact. It is not a permanent squat and not an attempt to eliminate every sensation of pressure. When a rise approaches the board, the distance between board and pelvis needs to shorten. As the surface falls away, it can lengthen again. The movement is continuous: arriving at maximum flexion before the bump leaves nowhere to go; staying compressed afterwards can leave the feet unable to follow the descending surface. Terrain timing matters more than matching a metronome. The body may still move vertically and the board may bend; neither automatically means failure.
Preparation and setting
Required: reliable traverse and stop on the edge being used, ability to flex without losing that edge, and a visible exit. Helpful preparation: AMTA-19 on a single rounded roller. Choose small, separated, soft-edged undulations with no hidden drop, rut trap or crossing traffic. An instructor should be able to observe from outside the travel corridor.
Execution and learning sequence
- Inspect the rise and identify where the board will begin climbing and descending. Set entry pace on smooth snow.
- Approach in the middle of a comfortable movement range, with both legs available and hands free for balance.
- As the board climbs, allow the feet to approach the pelvis. Keep the chest supported instead of folding the face toward the knees.
- Across the crest, continue accommodating the board; avoid a last-second push against the top.
- Follow the descending surface by lengthening the legs smoothly. Retain some knee bend rather than reaching a rigid end stop.
- Re-establish the original traverse, then stop in the planned place. Review the crest and the recovery separately.
Progression and transfer
Learn one rise before a sequence. Add a second rise with a different spacing before increasing speed. Transfer to a turn only when the absorption does not unintentionally flatten or overtip the board. In a turning application the legs must manage both terrain height and lateral support, so the movement will not look like a symmetrical squat.
Mastery and links
absorb differently spaced small rises on both edges with a planned stop. Continue to AMTA-02, 04 and 06; do not infer competence in a steep mogul field from one successful pass.
Diagnostic hypotheses and rechecks
Possible causes are hypotheses to test, not diagnoses inferred from one attempt.
| Observation | Possible cause | Diagnostic exercise | Correction | Recheck |
|---|---|---|---|---|
| Torso jolts upward at the crest | Legs stiff or flexion begins too late | AD01 on a smaller rise | Begin accommodation as the board climbs | Crest passes without an involuntary straightening |
| Rider stays folded after the bump | No recovery range; waist bend substitutes for leg action | Observe pelvis-to-board distance on runout | Lengthen the legs while retaining support | Ready stance returns before the next feature |
| Board unexpectedly leaves snow | Entry too fast, sharp feature or push at crest | Reduce feature demand before adjusting cue | Remove crest push; choose rounder terrain | Grounded outcome and controllable exit |
Existing target
AM25-01
Methodology notes
M01, M02, M03, M04
Environmental boundary
Managed terrain only; preserve the stated exit and fallback.
Editorial status
detailed_text_draft; coaching review pending.
01
Definition-first entry
This entry currently provides a verified identification and connected routes. Detailed instruction has not been fabricated.
CONNECTED KNOWLEDGE