{"actors":["Athletes completing bilateral or multidirectional motor-skill practice","Coaches who select drill direction, sequence, and total volume","Motor-learning staff who define valid task repetitions and interpret practice exposure","Video or session coders who record attempted, accepted, aborted, and reassigned repetitions","The lead coach or designated practice-design owner"],"affected_objective":"Keep each athlete's accumulated, task-specific directional practice exposure within a coach-approved balance band over a defined learning window, without automatically increasing total training volume or overriding athlete, clinical, or coaching decisions.","arm":"ORDINARY_DIVERSE_P2","authority_safety":{"authorized_first_step":"The lead coach may authorize retrospective counting and a shadow ledger for repetitions in one already scheduled bilateral drill; no repetitions, drill sequences, rest periods, or athlete assignments may be changed during this first step.","decision_authority":"The lead coach retains authority over drill content and any later rebalancing; athletes retain authority to stop or decline practice, and authorized clinical staff retain authority over participation restrictions and return-to-sport constraints.","excluded_actions":["Automatically adding repetitions or extending sessions when an imbalance threshold is crossed","Using directional-balance data to override pain, fatigue, medical, or return-to-sport restrictions","Treating an attempted, aborted, assisted, or technically invalid trial as an accepted repetition without the predeclared coding rule","Using the ledger for selection, compensation, discipline, or public athlete ranking","Pooling unlike motor tasks, difficulty levels, or movement directions merely to make the balance appear acceptable","Interpreting balanced repetition counts as proof of equivalent skill acquisition or injury protection"],"halt_rollback":"Halt shadow or live testing if athletes report symptoms associated with the drill, authorized restrictions are breached, directional labels cannot be coded consistently, compensatory sequencing disrupts required rest or total-volume limits, or apparent balance depends on reclassification. Roll back by disabling prompts, restoring the documented coach-selected sequence, preserving the audit ledger, and referring participation concerns to the appropriate decision-maker."},"baseline":"Compare the shadow policy with the existing coach-selected sequence for the same athlete, motor task, difficulty class, approved total repetition range, and rolling observation window. Existing practice proceeds unchanged while accepted repetitions, aborted trials, direction changes, and window expirations are reconstructed without alerts or sequencing prompts.","candidate_id":"stock_flow_accumulation_control__sport_science__ORDINARY_DIVERSE_P2","causal_chain":["Session plans may specify similar numbers of repetitions in opposing directions, yet interruptions, aborted trials, substitutions, time limits, and coach-selected sequencing determine which valid repetitions are actually completed.","Accepted repetitions persist in the athlete's recent task-specific practice history, so a series of locally balanced-looking sessions can still leave one direction cumulatively overrepresented.","Reporting only repetitions per minute, planned ratios, or the latest session conceals the carried stock of unmatched directional repetitions.","A ledger maintains coupled direction-specific stocks and reconciles their change against accepted repetitions, invalidated trials, task reclassifications, and repetitions aging out of the learning window.","A warning based on the signed imbalance and the remaining approved repetition capacity identifies when the current plan cannot return the stocks to the provisional band without changing total volume or violating constraints.","Within the existing coach-approved volume, sequencing an eligible underrepresented-direction repetition in place of an eligible overrepresented-direction repetition changes net accumulation while preserving rest and participation restrictions.","Monitoring task variants, assisted trials, and excluded repetitions tests whether apparent balance was created by moving exposure into incomparable categories.","Prompts are retired or retuned when reconciled direction-specific stocks remain within the approved band under ordinary coaching practice."],"cell_id":"stock_flow_accumulation_control__sport_science","consequence":"Motor-learning assessments may attribute performance differences to the training method while the athlete's accumulated opportunities to practice opposing directions were materially different, making the practice history harder to interpret and the intended bilateral design harder to execute.","diversity_from_prior_proposals":"This opportunity governs accumulated task-specific movement repetitions performed by athletes and changes drill sequencing within an approved practice volume. It does not concern wearable-data ingestion, record validation, analytical workflow clearance, data timeliness, or exception queues.","experiment_id":"eoa_inverse_innovation_exp13_second_slot_policy60_20260806","intervention":"Install a shadow stock-flow ledger for directional practice exposure in one bilateral motor task. For each athlete, maintain two stocks measured in accepted task repetitions over a predeclared rolling 14-day window: repetitions completed in direction A and direction B. Define the signed control stock as B(t)=S_A(t)-S_B(t), with the boundary restricted to the same task, difficulty class, assistance condition, and athlete. The motor-learning lead owns the definition; trained coding from session sheets or authorized video supplies the measurement; review occurs after each session. Accepted A and B repetitions enter their respective stocks; repetitions aging beyond 14 days decay from the appropriate stock; corrected coding transfers repetitions between named task or direction categories; aborted or invalid trials never enter; and missing classifications remain an explicit residual. Reconcile observed stock changes with accepted repetitions, transfers, corrections, and window expirations. In shadow mode, test a provisional warning when absolute imbalance exceeds 10% of the lower locally approved 14-day repetition target and a feasibility alert when remaining authorized repetitions cannot restore the band. Simulate a bounded lever that substitutes or reorders an eligible underrepresented-direction repetition within the existing coach-approved volume, rest, and restriction envelope. Monitor coupled task variants and excluded-trial categories before considering a live pilot.","mechanism_mapping":[{"counterfactual_removal":"Without reconciliation, planned repetitions or session-level ratios could appear balanced even when valid completed repetitions and window expirations leave a persistent directional difference.","mechanism_slug":"stock_flow_balance_reconciliation","role":"Reconciles each direction-specific opening stock with accepted repetitions, corrections, transfers, expirations, and the observed closing stock."},{"counterfactual_removal":"Without a lever on net directional flow, the ledger would describe imbalance but would not test whether the accumulated state can be changed within existing practice constraints.","mechanism_slug":"net_flow_lever_adjustment","role":"Tests substitution or reordering of an eligible repetition toward the underrepresented direction without automatically increasing total volume."},{"counterfactual_removal":"Without a level threshold and feasibility check, coaches could react to a single-session ratio while overlooking the accumulated imbalance or the remaining capacity to correct it.","mechanism_slug":"accumulation_threshold_alert","role":"Signals when the signed stock leaves its provisional band or cannot return using the remaining authorized repetitions in the window."},{"counterfactual_removal":"Without tracking task variants, assistance conditions, invalid trials, and uncoded direction, apparent balance could be manufactured by pooling incomparable repetitions or hiding them outside the primary stocks.","mechanism_slug":"hidden_accumulation_probe","role":"Maintains coupled category stocks and an unresolved residual so directional exposure cannot disappear through reclassification."},{"counterfactual_removal":"Without turnover rules for repetitions leaving the rolling window, old practice would remain in the control stock indefinitely and prompts could respond to exposure no longer inside the declared learning horizon.","mechanism_slug":"clearance_turnover_tuning","role":"Applies direction-specific window expiration and retunes sequencing prompts as recent practice turns over."}],"nearest_rivals":["A per-session fifty-fifty repetition quota that ignores valid completion, carryover, and rolling-window turnover","A total-practice-volume target that counts repetitions but does not distinguish movement direction","Technique feedback that changes repetition quality without governing accumulated directional exposure","A one-time compensatory drill block that does not reconcile subsequent inflow, expiration, reclassification, or renewed imbalance"],"negative_tests":{"intervention_falsifier":"The intervention is falsified as a stock-control improvement if shadow replay or a separately authorized bounded pilot does not change the reconciled imbalance trajectory relative to baseline, or if apparent improvement requires added volume, altered validity rules, breached restrictions, or transfers into incomparable task categories.","problem_falsifier":"The proposed problem is falsified if retrospective task-specific reconciliation shows no persistent directional carryover outside the provisional band, aborted and reclassified trials do not alter the planned balance, and existing coaching already keeps the coupled stocks reconciled over the declared window.","risks":["Directional coding may be unreliable for complex or continuously varying movements.","A count-based balance target may distract from repetition quality, task difficulty, or individual learning goals.","Prompts may make practice sequencing predictable when variability is an intended part of motor learning.","Substitution may remove repetitions serving a distinct tactical purpose despite sharing a nominal direction label.","Athletes or staff may treat the provisional band as a performance standard rather than a control hypothesis.","Additional coding may increase staff workload or encourage unnecessary video collection."],"strongest_counterevidence":"A preregistered retrospective count showing that accepted direction-specific repetitions already remain within the proposed band across complete learning windows—and that corrections, aborted trials, and task-category transfers do not change that conclusion—would undercut the need for the control layer."},"next_evidence_step":"For one already authorized bilateral drill, predeclare direction, task-equivalence, validity, assistance, and rolling-window rules; then have two trained coders independently reconstruct 28 days of existing sessions for a small coach-selected sample. Calculate daily S_A and S_B from accepted repetitions, corrections, transfers, and expirations; retain disagreements and missing classifications as residuals; compare planned ratios with reconciled imbalance; and replay the warning and within-volume substitution rule in shadow mode. Present coding reliability, falsifier results, and simulated stock trajectories to the lead coach before any practice change.","observable_state":"For each athlete and one predeclared motor task, S_A(t) and S_B(t) are the counts of accepted repetitions in directions A and B remaining inside a rolling 14-day boundary. The signed stock B(t)=S_A(t)-S_B(t) is reported separately from repetition rates and planned ratios. Authorized session sheets or video coding provide timestamps, direction, task class, assistance condition, validity, corrections, and expirations. The motor-learning lead owns the ledger and reviews it after each session. Reconciliation applies S_d(t2)=S_d(t1)+accepted_d+transfers_in_d-transfers_out_d-expirations_d for each direction d; any mismatch remains an unresolved residual.","prior_art_status":"UNSEARCHED","problem":"A bilateral or multidirectional motor-learning program may monitor planned repetition ratios or the balance within each session while overlooking the accumulated stock of valid practice completed in each direction across sessions. Aborted trials, interruptions, task substitutions, unequal validity, and rolling expiration can leave one direction persistently overrepresented even when plans and recent rates appear balanced. This makes the realized practice exposure diverge from the intended learning design without an explicit level, boundary, or turnover rule.","proposal_index":2,"remaining_contrastive_claim":"Unlike session quotas, total-volume monitoring, or technique feedback, this candidate should add value only when direction-specific valid repetitions persist as a reconciled carryover state and a bounded within-volume sequencing lever can change that state without displacing exposure into incomparable task categories.","revision_record":{"claim_changes":[],"conceptual_changes":[],"evidence_changes":[],"operational_changes":[],"parent_version":null,"progress_targets_addressed":[]},"schema_version":1,"structural_mapping":[{"archetype_element":"Accumulated stock, unit, boundary, owner, source, and cadence","domain_realization":"Coupled counts of accepted direction-A and direction-B repetitions for one athlete and equivalent motor task inside a rolling 14-day window, owned by the motor-learning lead and reviewed after each session from authorized records."},{"archetype_element":"Stock-flow distinction","domain_realization":"The accumulated direction-specific repetition counts and their signed difference are reported separately from planned ratios, repetitions per minute, and single-session completion rates."},{"archetype_element":"Inflow, outflow, decay, transfer, leakage, and conversion paths","domain_realization":"Accepted repetitions enter the relevant directional stock; window expiration removes them; coding corrections and task reclassification transfer them; invalid or aborted trials are excluded; missing classifications remain residuals rather than silently converting to accepted exposure."},{"archetype_element":"Net-flow balance and residual reconciliation","domain_realization":"Opening direction-specific stocks plus accepted repetitions and transfers minus expirations generate expected closing stocks, which are compared with observed coded counts and unresolved differences."},{"archetype_element":"Target band, warning threshold, and capacity constraint","domain_realization":"Shadow testing uses a provisional signed-imbalance band tied to the locally approved repetition target and alerts when remaining authorized repetitions cannot restore the band."},{"archetype_element":"Lever on net accumulation","domain_realization":"An eligible underrepresented-direction repetition may be substituted or advanced within existing coach-approved total volume, rest, task-equivalence, and participation constraints."},{"archetype_element":"Delay, turnover, feedback, and displacement checks","domain_realization":"Rolling-window expiration, delayed coding, prompt-driven sequencing, task variants, assistance conditions, and excluded trials are monitored so old exposure or category transfer cannot create false balance."},{"archetype_element":"Monitoring, retirement, and retuning","domain_realization":"Direction-specific trajectories and residuals are reviewed after sessions; prompts are withdrawn or adjusted if coding fails, constraints are breached, or ordinary practice keeps the stocks within the approved band."}],"title":"Rolling Stock Control for Directional Motor-Practice Exposure","version":0}