Proximal–Distal Claim, Alternative, and Falsification Atlas
Golf Biomechanics
Evidence
Falsification
Proximal–Distal Sequencing
A governed map from prominent proximal–distal claims to alternative mechanisms, discriminating measurements, uncertainty, and exact falsifiers.
This atlas is a compact reading aid for the full Proximal-to-Distal Energy Transfer technical monograph. It does not replace the monograph, adjudicate scientific consensus, or turn a model result into a statement about golfers. Each claim, evidence state, uncertainty boundary, and falsifier below is projected verbatim from the pinned claim authority. Editorial mappings supply only the alternative question, discriminating measurement, and exact reading target.
WarningInterpretation Boundary
The atlas supports critical review. It is not coaching, clinical, equipment, participant-validation, or causal authority. An unavailable workflow remains visible until UpstreamDrift publishes a qualified exact-commit companion record.
Similar Endpoints Can Hide Different Internal Pathways
- Claim authority
- PD-CLAIM-131: Across the ladder, no single joint force, clock delay, or torque sign defines useful transfer; model optimization should report event-window force, couple, power, work, constraint, endpoint, and robustness diagnostics together, without promoting this conditional framework to coaching advice.
- Current evidence state
- supported
- This establishes
- Research design implications from the declared reduced models.
- This does not establish
- No universal human control strategy is identified.
- Alternative mechanism
- Different combinations of force, couple, work, constraint reaction, and structural storage can converge on a similar endpoint outcome.
- Discriminating measurement
- Compare event-window force, couple, power, work, constraints, and robustness under matched endpoint outcomes and same-state interventions.
- Falsifier
- A robust governed human study establishes a simpler sufficient strategy or current text prescribes technique.
- Critique question
- Does selecting only endpoint speed make distinct internal mechanisms appear equivalent by construction?
- Critique state
- crit-simulation-tautology: open
- Research readiness
- ad-protocol-model-ladder-001: simulation-ready (modeled)
- Validation release
- unavailable: Obtain an immutable verified #4042 release reference.
- Workflow unavailable
- No qualified provider companion workflow record has been published for the cross-tier matched-endpoint study.
Read the exact monograph section · Open the governed critique · Inspect exact readiness record · Inspect exact source revision
Evidence artifacts
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docs/research/proximal_distal_energy_transfer/data/mechanism_ladder_study.json -
docs/research/proximal_distal_energy_transfer/data/mechanism_ladder_traces.npz -
scripts/research/proximal_distal_energy/run_mechanism_ladder_study.py -
scripts/research/proximal_distal_energy/mechanism_ladder.py -
tests/research/test_mechanism_ladder_evidence.py -
tests/research/test_mechanism_ladder.py
A Timing Change Is Not Automatically Beneficial Transfer
- Claim authority
- PD-CLAIM-237: Exact 30 ms same-state killswitches give nonmonotonic channel effects: continued torso and wrist commands add 1.223 and 1.818 m/s, whereas continued bilateral-arm commands reduce delivery speed by 1.364 m/s in the registered program.
- Current evidence state
- supported
- This establishes
- One exact same-state branch within the declared rotating-base mechanism.
- This does not establish
- A channel continuation effect is conditional on state, commands, model, and endpoint; it is not an anatomical or coaching effect.
- Alternative mechanism
- State-dependent continuation of one command channel can alter sequence timing while reducing the registered delivery objective.
- Discriminating measurement
- Run exact same-state channel interventions across registered programs and report endpoint, work, load, and robustness changes together.
- Falsifier
- Pre-branch states differ or branch recomputation reverses the recorded channel differences.
- Critique question
- Is an observed timing change being treated as beneficial without a matched objective and intervention?
- Critique state
- crit-sequencing-lie-bracket-fallacy: open
- Research readiness
- ad-protocol-neural-timing-001: simulation-ready (manufactured-synthetic)
- Validation release
- unavailable: Obtain an immutable verified #4042 release reference.
- Workflow unavailable
- The protected provider catalog does not yet expose the rotating-base same-state killswitch workflow.
Read the exact monograph section · Open the governed critique · Inspect exact readiness record · Inspect exact source revision
Evidence artifacts
-
docs/research/proximal_distal_energy_transfer/data/rotating_base_torso_velocity_study.json -
docs/research/proximal_distal_energy_transfer/data/claim_numeric_reported_values.json
Attribution Depends on Coordinates and Endpoint Mapping
- Claim authority
- PD-CLAIM-306: Virtual-work least squares reports a minimum-norm force-only endpoint equivalent together with rank and unreconstructed generalized residual; signed/absolute tangent impulse, power, and work remain distinct observables.
- Current evidence state
- supported
- This establishes
- Exact planar double-pendulum generalized coordinates with a frozen bounded torque-program grid and an impact-truncated endpoint mapping.
- This does not establish
- A rank-deficient force-only equivalent is not a complete grip wrench, and generalized component work is not automatically subsystem transfer.
- Alternative mechanism
- Coordinate partitions and minimum-norm endpoint maps can redistribute attributed components while preserving only the reconstructed total drive.
- Discriminating measurement
- Repeat the decomposition in declared coordinate systems and compare physical wrench, residual, tangent impulse, power, and work invariants.
- Falsifier
- The mapped force and retained residual do not reconstruct the generalized drive, or undefined zero-speed tangent intervals contribute to integration.
- Critique question
- Does a named generalized component survive a change of coordinates and physical endpoint representation?
- Critique state
- crit-control-causality-mechanical: responded
- Research readiness
- ad-protocol-model-ladder-001: simulation-ready (modeled)
- Validation release
- unavailable: Obtain an immutable verified #4042 release reference.
- Workflow unavailable
- The exact force-source attribution workflow is not yet present in a qualified provider companion release.
Read the exact monograph section · Open the governed critique · Inspect exact readiness record · Inspect exact source revision
Evidence artifacts
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docs/research/proximal_distal_energy_transfer/data/force_source_optimization.json -
docs/research/proximal_distal_energy_transfer/figures/fig_force_source_optimization.pdf -
scripts/research/proximal_distal_energy/force_source_optimization.py -
scripts/research/proximal_distal_energy/run_force_source_optimization.py -
src/shared/python/biomechanics/force_source_attribution.py -
tests/research/test_force_source_optimization.py -
tests/unit/biomechanics/test_force_source_attribution.py
One Net Club Wrench Does Not Identify Two Hand Loads
- Claim authority
- PD-CLAIM-068: Two-hand common and differential modes are mechanically distinct: opposing contact forces can cancel in the resultant while generating a couple or internal squeeze, and equal club action does not identify joint loading, co-contraction, robustness, or effort strategy.
- Current evidence state
- supported
- This establishes
- Declared planar two-contact wrench geometry; external context is multifinger prehension and one instructed fast two-hand grasp task.
- This does not establish
- The external studies are not golf, do not rank golf strategies, and do not validate the model's quantitative force allocation.
- Alternative mechanism
- Common and differential hand-force modes can produce the same resultant while changing couple, internal squeeze, and unobserved joint loading.
- Discriminating measurement
- Acquire synchronized bilateral six-axis grip wrenches and club kinematics, then test allocation invariance and reconstruction closure.
- Falsifier
- Common/differential reconstruction fails or measured golf contact forces uniquely identify effort from net wrench alone.
- Critique question
- Is a net club wrench being used to infer individual-hand loading, effort, or muscle coordination?
- Critique state
- crit-ztcf-identifiability: open
- Research readiness
- ad-protocol-bilateral-hand-wrench-001: simulation-ready (manufactured-synthetic)
- Validation release
- unavailable: Obtain an immutable verified #4042 release reference.
- Workflow unavailable
- No qualified provider workflow or governed human bilateral grip-wrench dataset is publicly available.
Read the exact monograph section · Open the governed critique · Inspect exact readiness record · Inspect exact source revision
Evidence artifacts
-
https://doi.org/10.3200/JMBR.40.5.446-476 -
https://doi.org/10.1007/BF00198762 -
tests/research/test_hand_path_attribution_study.py
Prescribed or Fixed Bases Can Manufacture Coupling
- Claim authority
- PD-CLAIM-159: Within this coupled tier, separated force moment arms can create a late negative club couple, the couple can persist after same-state command removal, and endogenous base motion and shaft flex do not automatically remove it; explicit sign, branch, geometry, closure, and convergence failures would contradict the result.
- Current evidence state
- supported
- This establishes
- Synthesis of registered reference, intervention, geometric control, and convergence evidence.
- This does not establish
- The synthesis establishes mechanical possibility only, not prevalence, benefit, optimality, or human causation.
- Alternative mechanism
- A fixed or prescribed base can suppress or inject momentum pathways that change contact reactions and apparent distal transfer.
- Discriminating measurement
- Compare fixed, prescribed, and finite-mass coupled-base tiers from matched states with sign, closure, convergence, and geometry controls.
- Falsifier
- Any enumerated falsification condition occurs under the registered executable study without correction.
- Critique question
- Would the apparent mechanism persist when base motion is endogenous rather than prescribed or fixed?
- Critique state
- crit-effective-plant-fallacy: open
- Research readiness
- ad-protocol-model-ladder-001: simulation-ready (modeled)
- Validation release
- unavailable: Obtain an immutable verified #4042 release reference.
- Workflow unavailable
- The coupled moving-base workflow has not been published through the qualified provider companion contract.
Read the exact monograph section · Open the governed critique · Inspect exact readiness record · Inspect exact source revision
Evidence artifacts
-
docs/research/proximal_distal_energy_transfer/data/moving_base_flexible_study.json -
docs/research/proximal_distal_energy_transfer/data/moving_base_flexible_study.npz -
scripts/research/proximal_distal_energy/moving_base_flexible_club.py -
scripts/research/proximal_distal_energy/run_moving_base_flexible_study.py -
tests/research/test_moving_base_flexible_club.py -
tests/research/test_moving_base_flexible_evidence.py
Shaft Recoil, Actuation, Damping, and Contact Are Confounded
- Claim authority
- PD-CLAIM-144: The model motivates only the hypothesis that elastic storage changes timing and configuration, while matched endpoint performance depends on actuation, damping, and endpoint rather than peak strain alone.
- Current evidence state
- untested
- This establishes
- One torsional coordinate over a broad grid.
- This does not establish
- No general recoil benefit or negligibility is shown.
- Alternative mechanism
- Changes in actuation, damping, contact allocation, or endpoint definition can explain delivery differences attributed to elastic storage alone.
- Discriminating measurement
- Use calibrated paired flexible and rigid tests with measured deformation, bilateral contact, matched commands, and matched endpoint conditions.
- Falsifier
- Calibrated paired tests reject the relationship.
- Critique question
- Is peak shaft strain being credited as beneficial recoil without matching actuation, damping, contact, and endpoint?
- Critique state
- crit-stiffness-pulse-paradox: open
- Research readiness
- ad-protocol-equipment-response-001: simulation-ready (manufactured-synthetic)
- Validation release
- unavailable: Obtain an immutable verified #4042 release reference.
- Workflow unavailable
- No qualified provider record currently joins the shaft study, calibrated assets, and representative execution workflow.
Read the exact monograph section · Open the governed critique · Inspect exact readiness record · Inspect exact source revision
Evidence artifacts
-
docs/research/proximal_distal_energy_transfer/data/shaft_contribution_study.json -
docs/research/proximal_distal_energy_transfer/data/shaft_contribution_traces.npz -
scripts/research/proximal_distal_energy/flexible_shaft_study.py -
scripts/research/proximal_distal_energy/run_shaft_contribution_study.py -
tests/research/test_flexible_shaft_study.py -
tests/research/test_shaft_contribution_evidence.py