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Term

Turn Phases

Initiation, control and finish as assessment categories for a turn.

GLOSSARY

Breaking a turn into phases — start, control and finish — gives coaches a shared language for analysing where a turn goes well or wrong.

Context and distinction

Phase names vary by teaching system (initiation/shaping/completion is another version).

Explore the glossary →

HOW TO DO IT

Turn Phases

Turn phases provide a practical analysis language: initiation establishes the new task, control shapes the arc, finish prepares completion and transition. Actual movements overlap these labels.

Preparation and setting

A reproducible turn task and an agreed observation point.

How to understand / apply it

  1. State the intended turn outcome.
  2. Identify edge release and new-edge initiation.
  3. Observe heading, pressure and shape through the arc.
  4. Identify the finish and preparation for the next turn.
  5. Connect an observed problem to its phase before selecting feedback.

How to learn / practise

Analyse several comparable turns, then give one phase-specific cue. Reobserve the same phase rather than changing the whole task.

Errors and corrections

Diagnosing a finish problem from one still posture: follow the sequence. Treating phase boundaries as universal timestamps: use them as descriptions of this task.

Observable checks

The observation states what happened, where in the turn and what changed after feedback.

Sources: AASI — Snowboard Performance Guide, v2.0, November 7, 2022

HOW TO DO IT

Turn phases: progressive engagement; pressure timing; completion; release

Pressure is the interaction of support, movement and trajectory. Fore/aft loading and overall loading are different observations. Carving organizes an edge-supported path with little lateral skid. Edge angle, inclination, angulation, pressure and trajectory must be interpreted through the board's actual response.

Preparation and setting

Use the setting and competence boundary below. This is a page-level learning/application text; use the exact linked movement for reproduction instructions.

Execution / application sequence

  1. Identify where support is concentrated.
  2. Observe when the load builds or releases.
  3. Compare a modest change on suitable terrain.
  4. Keep an available controlled finish.
  5. Choose a wide clear suitable piste.
  6. Start with established rounded linked turns.
  7. Identify the phase to change using the matching Package1 card.
  8. Increase demand modestly while preserving speed management and space.
  9. Observe the track and exit.
  10. Return to the simpler turn if grip or line fails.

Learning and practice

Compare tracks and the earliest loss of organization. Use the named style's mechanics rather than trying to touch snow as the goal.

Errors, limits and corrections

More edge angle cannot compensate for poor line, unsuitable grip or a clearance problem.

Observable checks

The page-specific task, conditions, known components and missing procedure can be explained. Successful application is checked in the actual task, not inferred from reading.

Related: Package1:TC22-15, Package1:TC22-12, Package1:TC22-22

HOW TO DO IT

Early Edge Development and Patient Loading

Early edge development establishes useful new-turn support before relying on strong shaping. Patient loading means allowing that support and path to develop before adding an abrupt demand. It does not mean doing nothing throughout the top of the arc or waiting for a universal clock position. Early is relative to the intended task. Beginner skidded turns and developed carved turns need different emphasis. A large immediate inside dive can produce a dramatic angle but poor support. Conversely, retaining the old edge too long can force all direction change and braking into the finish.

Preparation and setting

Required: short controlled linked carves or clean individual arcs and a predictable release. Helpful: CD09 and CD10. Use familiar suitable terrain and one chosen shape. Do not transplant a historical clinic's timing directly into steep ice practice.

Learn and reproduce it

  1. Observe an ordinary pair. Identify old-edge release, first useful new-edge support and where the main path change occurs.
  2. Rehearse restoring usable support through transition instead of retaining the previous leaned posture.
  3. In the next pair, develop modest new-edge tilt progressively earlier in the available entry. Avoid a hard catch while residual travel would make the edge inappropriate.
  4. Let a supported arc begin before stronger shaping effort. Keep joints available; patient does not mean rigid.
  5. Compare entry trace and finish demand. If the entry improves but speed control deteriorates, adjust the route rather than simply increasing load.
  6. Vary timing modestly while keeping intensity comparable. Then vary intensity separately. Stop the comparison if corridor or stop margin changes materially.
  7. Transfer the useful timing to both transitions. Reassess when speed, snow or gradient changes.

Exercises and correction

CD13 is the early-support comparison; CD14 tests gradual loading; CD23 diagnoses the opposite pattern of late entry.

Evidence and progression

The rider develops useful early support with less abrupt finish demand and stable speed. This is a timing outcome, not a required angle or a mandatory national script.

Diagnostic hypotheses and rechecks

Possible causes are hypotheses to test, not diagnoses inferred from one attempt.

ObservationPossible causeDiagnostic exerciseCorrectionRecheck
Large new angle followed by an inside fallTilt/inclination exceeds established supportCD13 smaller initial demandDevelop support progressively without a body diveNew arc starts without an arm rescue
Edge engages but path immediately brushesRotation/loading added before usable supportCD13 with reduced impulseSeparate support development from abrupt shapingCleaner entry under comparable conditions
“Patience” creates a long straight downhill segmentCue interpreted as delayed actionCD13 event-based timingRemain actively supported and develop appropriate new engagementEntry remains rounded within corridor

Methodology connection

CM09 is Keith Stubbs's first-person APSI clinic report, not an APSI manual. CM08 cautions against an unsupported early dive. These notes are compatible at the outcome level but are not merged into a claimed joint curriculum.

Editorial status

detailed_text_draft; coaching review pending.

Existing placement anchors

05.03; 05.14; 02.08

Related: Exercises: CD09, CD10, CD13, CD14, CD23 Source: CASI / ACMS — Carving Instructor Course Guide; Simon Holden, CASI Level 4 / CSIA Level 4 — The Critical Link; Keith Stubbs, NZSIA Interski report on an APSI clinic — Adapting Core Concepts to Create Versatile Snowboard Instructors by Australia

01

editorial review notes

Movement and pressure patterns depend on the task and level.

CONNECTED KNOWLEDGE

WHAT THIS ENTRY CONNECTS TO