{"abstention_reason":null,"arm":"SUBSTRATE_DIVERSE_P2","candidate_id":"discrete_continuous_model_selection__sport_science__SUBSTRATE_DIVERSE_P2","cell_id":"discrete_continuous_model_selection__sport_science","decision":"PROPOSAL","experiment_id":"eoa_inverse_innovation_exp13_second_slot_policy60_20260806","proposal":{"actors":["Consenting adult athletes already scheduled for an approved plyometric session","Strength-and-conditioning coach who owns drill prescription","Biomechanist responsible for force measurement and calibration","Equipment technician responsible for installation and electrical safety","Sports-medicine clinician who retains medical authority"],"affected_objective":"Determine whether plyometric drills and set configurations deliver mechanically comparable landing-load exposure, so a later coach-approved protocol can specify dose without treating every counted contact as equivalent.","arm":"SUBSTRATE_DIVERSE_P2","authority_safety":{"authorized_first_step":"The biomechanist may bench-calibrate a portable force plate and collect shadow measurements during one already-approved plyometric session; measurements cannot alter that session or any athlete decision.","decision_authority":"The coach retains training-prescription authority, the clinician retains medical authority, the equipment technician controls installation safety, and each athlete may decline or stop participation.","excluded_actions":["Changing drill type, volume, intensity, rest, or landing instructions from the approved session","Automatic stopping, progression, or load adjustment from instrument output","Diagnosis, injury-risk scoring, treatment, or return-to-play decisions","Using measurements for selection, contracts, discipline, or compensation","Interpreting saturated, clipped, shifted-surface, or uncalibrated traces as valid exposure"],"halt_rollback":"Stop if the plate or covering shifts, changes the intended landing surface, presents an electrical or trip hazard, loses calibration, clips signals, or influences training decisions. Remove the apparatus, mark affected traces invalid, and resume only the preapproved activity on its ordinary inspected surface."},"baseline":"Plyometric dose is recorded as drill name, sets, and counted ground contacts. Occasional video or summary peak-force measurements may describe technique, but the baseline assumes that contacts are interchangeable units and does not preserve continuous force-time exposure within each landing.","candidate_id":"discrete_continuous_model_selection__sport_science__SUBSTRATE_DIVERSE_P2","causal_chain":["Each landing physically loads the instrumented surface through a time-varying ground-reaction force.","Strain-gauge transducers in the calibrated force plate convert that mechanical loading into an analog force-time signal.","A measurement bandwidth and sampling cadence sufficient for short landing contacts preserve impact peaks and loading-rate changes that set-level averages would smooth away.","Contact onset and release delimit discrete landing events, preventing standing, repositioning, and rest intervals from being merged into the exposure.","Integrating the continuous force above supported body weight within each contact produces a force-time impulse without dividing the landing into arbitrary technique stages.","Summing validated contact impulses produces a continuous set-level exposure, while retaining individual contact pulses reveals outliers and within-set drift.","Equal-count sets can then be tested for mechanical equivalence rather than assumed equivalent from repetition number alone.","Calibration and transition checks determine whether the hybrid contact-plus-flow representation is sufficiently faithful to support a later, separately authorized dose specification."],"cell_id":"discrete_continuous_model_selection__sport_science","consequence":"Counting every landing as one unit can make equal-count drills appear equivalent despite materially different force-time exposure, while a set-wide average can smooth away isolated high-load contacts. This weakens comparison across drills and can confound training-dose studies.","diversity_from_prior_proposals":"P1 concerns same-day readiness and whether physiological trajectories or sudden health-related events justify human session review. This proposal concerns mechanical equivalence of plyometric drill dose; it intervenes with a calibrated force-transduction surface, observes landing force-time physics, and derives exposure through contact segmentation and impulse accumulation. It neither repairs nor extends P1's readiness representation, event vocabulary, or decision pathway.","experiment_id":"eoa_inverse_innovation_exp13_second_slot_policy60_20260806","intervention":"Place a calibrated portable force plate beneath the normal landing zone for a bounded shadow study. Record the physical ground-reaction-force waveform at 1 kHz, treat plate loading and unloading as discrete contact boundaries, retain continuous force within each contact, and calculate per-contact and cumulative set impulse. Preserve the raw analog trace and calibration record so the result is not reducible to contact counts or a single set average.","mechanism_mapping":[{"counterfactual_removal":"Without a continuous process representation, force magnitude and duration collapse back into nominally identical contact counts.","mechanism_slug":"continuous_process_model","role":"Represents mechanical loading within each landing as a force-time curve whose integral supplies a continuous exposure quantity."},{"counterfactual_removal":"Without discrete contact boundaries, force from landings, standing, repositioning, and rest can be merged into a misleading smooth total.","mechanism_slug":"hybrid_discrete_continuous_model","role":"Combines discrete landing contacts with continuous force evolution inside each contact."},{"counterfactual_removal":"Without resolution auditing, short peaks, plate unloading, clipping, or closely spaced contacts could be missed despite an apparently complete trace.","mechanism_slug":"transition_resolution_audit","role":"Tests whether transducer bandwidth, 1 kHz sampling, boundary rules, and signal range preserve consequential transitions."}],"nearest_rivals":["Counting total ground contacts as interchangeable dose units","Using drill name and box height as proxies for mechanical exposure","Comparing only set-average or peak ground-reaction force","Video-based manual classification of landing technique without direct force measurement","Using session duration or perceived exertion as the plyometric dose measure"],"negative_tests":{"intervention_falsifier":"Reject the intervention if calibrated force traces cannot reproducibly delimit contacts and recover known test impulses, if the installed surface measurably changes landing mechanics, or if the hybrid measure fails to distinguish deliberately contrasted force-time exposures that share the same contact count.","problem_falsifier":"The problem is unsupported in the bounded setting if contact count predicts cumulative validated impulse within a prespecified practical tolerance across the tested drills and athletes, with no consequential outlier contacts or within-set drift hidden by counting.","risks":["The plate or cover could alter surface stiffness, traction, or athlete targeting behavior.","Signal clipping, resonance, drift, or cross-talk could create false peaks.","Body-weight subtraction and contact boundaries could be applied inconsistently.","A cumulative impulse measure could obscure loading rate or directional forces if used alone.","Athletes could change technique because they know they are being measured.","Measurements could be overinterpreted as injury predictions or individual performance rankings."],"strongest_counterevidence":"The strongest counterevidence would be stable calibration plus near-proportionality between contact count and cumulative impulse across all tested drill configurations, with narrow per-contact distributions and no decision-relevant information added by the force-time representation."},"next_evidence_step":"Bench-test the plate with certified static loads and a repeatable drop mass, then install it flush beneath the ordinary landing cover after confirming unchanged surface height and compliance. During one already-approved session, collect shadow traces from consenting adults performing their scheduled drills. Blind two reviewers to drill labels while they mark contacts and invalid segments. Compare count-only, set-average, and hybrid contact-plus-impulse representations for calibration recovery, reviewer agreement, clipping, equal-count exposure differences, and within-set outliers. Make no training or safety-effect claim from this feasibility sample.","observable_state":"For every measured set, retain the calibration status, raw force-time trace, sampling cadence, contact onset and release markers, per-contact peak and impulse, cumulative validated impulse, between-contact intervals, clipped or missing segments, reviewer disagreements, and installation checks for surface movement or altered compliance.","prior_art_status":"UNSEARCHED","problem":"Plyometric training and research commonly express dose as a discrete number of jumps or ground contacts, although landing force varies continuously in magnitude and duration across drills, athletes, and repetitions. The count creates false equivalence between mechanically unlike contacts, whereas set-level smoothing can hide isolated high-load landings; the representation therefore does not reliably support drill-dose comparison.","proposal_index":2,"remaining_contrastive_claim":"Conditional on stable calibration and negligible measurement-surface effects, discrete contact boundaries containing continuous force-time measurements should identify mechanically unequal equal-count sets and consequential individual contacts that count-only or set-average representations cannot preserve.","revision_record":{"claim_changes":[],"conceptual_changes":[],"evidence_changes":[],"operational_changes":[],"parent_version":null,"progress_targets_addressed":["Created a second opportunity with a different affected problem, decision, intervention, and causal path from sealed P1.","Made physical force transduction, rather than governance or computation, the essential causal substrate.","Specified bounded calibration, falsification, surface-effect checks, authority limits, and rollback conditions."]},"schema_version":1,"structural_mapping":[{"archetype_element":"Decision Need","domain_realization":"Determine whether plyometric drills and set configurations are mechanically dose-equivalent for later protocol specification."},{"archetype_element":"Process Change Signature","domain_realization":"Landing exposure consists of discrete foot-contact pulses containing continuously varying ground-reaction force and accumulating across a set."},{"archetype_element":"Granularity Choice","domain_realization":"Use individual contacts as event boundaries, a 1 kHz force-time curve within each contact, and cumulative impulse at set level."},{"archetype_element":"Step Boundary","domain_realization":"A contact begins when calibrated plate force rises above the unloaded noise band and ends when it returns below that band for a validated minimum interval."},{"archetype_element":"Continuity Assumption","domain_realization":"Force is treated as continuous only within a valid contact; no interpolation crosses unloading intervals, clipped samples, or invalid plate states."},{"archetype_element":"Measurement Resolution","domain_realization":"A calibrated force plate with suitable transducer bandwidth is sampled at 1 kHz, with range and step response verified before athlete measurement."},{"archetype_element":"Hybrid Boundary Rule","domain_realization":"Discrete loading and unloading boundaries segment the trace; continuous force is integrated only inside validated contacts, then accumulated across the set."},{"archetype_element":"Transition Validation","domain_realization":"Certified loads, repeatable drop tests, and blinded dual-review contact marking test amplitude, impulse, and boundary recovery."},{"archetype_element":"Approximation Error Check","domain_realization":"Compare equal-count sets for unequal cumulative impulse and inspect whether set averages hide isolated force-time pulses."},{"archetype_element":"Reversibility Check","domain_realization":"The apparatus is removable and operates only in shadow mode, so ordinary counting and the approved session remain unchanged."}],"substrate_contract":{"counterfactual_independence":"If software, algorithms, databases, dashboards, recommendations, and digital control are removed, the calibrated strain gauges still physically transduce landing force into an analog time-varying electrical trace. Contact pulses can be inspected and their areas measured with an analog recorder or manual numerical integration; therefore the essential observability effect survives removal of those wrappers.","forbidden_channel_audit":"No governance rule, training process, incentive, predictive model, database, information-routing system, or automated controller supplies the intervention's essential effect. Such elements may authorize collection, store traces, display results, or assist arithmetic, but only mechanical loading of the force plate and its instrument transduction create the new evidence.","primary_allowed_process":"MEASUREMENT_INSTRUMENTATION"},"title":"Instrumented Force-Time Calibration of Plyometric Contact Dose","version":0},"schema_version":1}