{"closest_prior_art":[{"name":"Healy, Kenny, and Harrison four-split velocity-curve model","overlap":"Generates continuous velocity-time and velocity-distance curves from sprint split records and presents them as information for coaches and researchers.","remaining_difference":"It models race-performance velocity from sparse splits; it does not combine calibrated center-of-mass velocity with distance-indexed trunk angle, uncertainty and interruption flags, or test blinded cue-interval localization against phase annotations.","source_ids":["SRC1"]},{"name":"Nagahara et al. step-to-step thorax and pelvis analysis","overlap":"Measures step-to-step trunk and pelvic kinematics throughout sprint acceleration and shows that relevant postural factors change with increasing running speed rather than increasing proportionally.","remaining_difference":"It is a group biomechanical study, not a retrospective coaching representation that removes internal phase boundaries or compares reviewer cue locations across representations.","source_ids":["SRC2"]},{"name":"VideoRun2D markerless sprint-biomechanics curves","overlap":"Produces time-normalized trunk, hip, and knee angle curves from sprint video, validates them against manual frame labeling, and documents subject- and time-dependent measurement error.","remaining_difference":"It normalizes and averages strides rather than aligning velocity and trunk angle continuously over trial distance; it also does not expose missing intervals or test representation-stable coaching judgments.","source_ids":["SRC3"]},{"name":"NovaSpeed continuous laser velocity product","overlap":"A first-party commercial system already supplies coaches with a high-sampling-rate continuous sprint velocity curve and shareable reports, establishing continuous velocity display as a product practice.","remaining_difference":"The public product description does not show synchronized trunk-angle profiles, phase-free cue localization, uncertainty or missing-data displays, interruption exclusions, smoothing audits, or blinded comparison with fixed splits.","source_ids":["SRC4"]}],"contrastive_claim_falsifier":"The contrast is falsified if, on preregistered eligible trials, fixed splits and named phases produce equal or better inter-reviewer cue-interval agreement and equal or better stability across repeat review, or if the continuous result changes materially across defensible resolution and smoothing choices or repeatedly absorbs visible brief departures.","contrastive_claim_remaining":"For uninterrupted, adequately calibrated trials containing decision-relevant change within fixed splits, a distance-indexed velocity-and-trunk-angle profile with explicit uncertainty, resolution limits, missing intervals, and interruption exclusions will yield more representation-stable localization of possible coaching-cue intervals than fixed splits or named phases. None of the retained adjacent sources tests that comparative claim.","experiment_id":"eoa_inverse_innovation_exp13_second_slot_policy60_20260806","gates":{"adequate_source_search":{"rationale":"The bounded search covered the exact proposal title and cue-interval language, continuous-profile and step-to-step terminology, drive/transition/upright and split terminology, measurement systems, video analysis, products, and combinations of velocity, trunk angle, distance, and feedback. Four opened sources span three primary studies and one first-party product from four publishers. Exact-title and cue-interval searches produced no exact implementation, but phrase misses were not treated as novelty evidence.","source_ids":["SRC1","SRC2","SRC3","SRC4"],"status":"PASS"},"bounded_next_test":{"rationale":"A small, reversible comparison using existing authorized trials, preregistered resolution and smoothing settings, separate blinded reviews, and explicit agreement, sensitivity, residual, missing-data, and interruption outcomes is feasible. Existing studies show that velocity curves and trunk-angle curves can be generated, while their reported accuracy limitations justify the proposed audits.","source_ids":["SRC1","SRC2","SRC3"],"status":"PASS"},"distinct_testable_claim":{"rationale":"The remaining claim is not merely that continuous sprint curves can be produced; that is prior art. It predicts measurably greater stability of reviewer-selected cue intervals relative to fixed splits and named phases under controlled smoothing and resolution choices.","source_ids":["SRC1","SRC2","SRC3","SRC4"],"status":"PASS"},"no_obvious_safety_or_authority_stop":{"rationale":"The first step is confined to authorized retrospective records and shadow analysis; coaches retain feedback authority, athletes retain drill refusal authority, and calibration, consent, privacy, discontinuity, and operational-influence failures trigger stopping and rollback. Published markerless-video errors make the calibration stop material but do not prohibit the bounded test.","source_ids":["SRC3"],"status":"PASS"},"supported_problem":{"rationale":"Sprint velocity and trunk orientation are already analyzed as curves or step-to-step trajectories, and trunk factors vary across acceleration rather than changing proportionally. Sparse split-derived models also show weaker agreement at 10 m, and video-derived angle errors vary by subject and time. This supports gradual within-trial change and resolution risk, but the retained sources do not directly prove that named phase edges cause unstable or incorrect cue placement.","source_ids":["SRC1","SRC2","SRC3"],"status":"PASS"}},"prior_art_disposition":"ADJACENT_PRIOR_ART","problem_evidence":{"finding":"The problem is partly visible: primary studies represent velocity continuously and trunk mechanics step by step, demonstrating nonproportional change across acceleration and meaningful measurement limitations. Commercial continuous velocity curves also exist. Direct evidence that fixed split or named-phase boundaries conceal a cue-worthy departure or change coaching-cue placement was not found in the retained sources.","source_ids":["SRC1","SRC2","SRC3","SRC4"],"status":"PARTLY_SUPPORTED"},"research_id":"eoa_inverse_innovation_exp13_light_screen_20260806","schema_version":1,"screen_id":"E13P145","screen_survival":true,"search_lanes":{"component_combination":{"no_result_note":null,"queries":["sprint acceleration continuous distance velocity trunk angle profile biomechanics","continuous kinematic analysis sprint acceleration distance normalized trunk angle","sprint acceleration trunk angle velocity curve coaching feedback distance profile","site:pmc.ncbi.nlm.nih.gov sprint acceleration trunk angle velocity distance kinematics continuous"],"source_ids":["SRC1","SRC2","SRC3"]},"direct_problem_and_intervention":{"no_result_note":"The exact proposal title and quoted cue-interval search produced no exact matching implementation; adjacent curve, biomechanics, coaching, and product results were assessed instead.","queries":["\"Continuous Distance Profiles for Localizing Sprint-Acceleration Technique Feedback\"","sprint acceleration \"cue interval\" continuous profile","sprint technique feedback continuous distance profile"],"source_ids":["SRC1","SRC2","SRC3","SRC4"]},"products_practices_and_standards":{"no_result_note":null,"queries":["sprint video analysis software velocity distance splits biomechanics","continuous speed profile sprint coaching laser radar product first party","sports biomechanics video analysis calibration guidelines frame rate uncertainty official","ISBS video analysis calibration sports biomechanics standards"],"source_ids":["SRC3","SRC4"]},"synonyms_and_historical_terms":{"no_result_note":null,"queries":["sprint acceleration phases drive transition upright coaching 10 m splits","sprint acceleration kinematics trunk straightening step by step distance Nagahara 2017","sprint acceleration velocity curve continuous radar split times research","block start acceleration posture velocity curve phases"],"source_ids":["SRC1","SRC2"]}},"sources":[{"claims_supported":["Four split times were used to generate mono-exponential velocity-time and velocity-distance curves for 82 elite male sprinters.","Model agreement was excellent for most measures but notably weaker for the 10 m time, showing that early-acceleration resolution is consequential.","The authors recommend using the modeled variables with split times to inform training."],"publisher":"Journal of Sport and Health Science / Elsevier on behalf of Shanghai University of Sport","source_id":"SRC1","source_type":"PRIMARY_RESEARCH","title":"Profiling elite male 100-m sprint performance: The role of maximum velocity and relative acceleration","url":"https://pmc.ncbi.nlm.nih.gov/articles/PMC8847979/"},{"claims_supported":["Three-dimensional step-to-step thoracic and pelvic angles were measured throughout 50 m of acceleration.","Trunk-related factors associated with speed differed across initial, middle, and final acceleration sections.","The authors concluded that acceleration is not characterized only by proportional increases in trunk movement magnitudes."],"publisher":"Journal of Sports Sciences / Taylor & Francis","source_id":"SRC2","source_type":"PRIMARY_RESEARCH","title":"Kinematics of the thorax and pelvis during accelerated sprinting","url":"https://pubmed.ncbi.nlm.nih.gov/28462572/"},{"claims_supported":["The system estimates sprint trunk, hip, and knee angle curves from video and compares them with manually marked Kinovea ground truth.","MoveNet errors ranged approximately 3.2 to 5.5 degrees overall and varied by subject and stride time.","The authors warn that current precision may be insufficient for demanding applications and that visually plausible tracking can misrepresent biomechanics."],"publisher":"arXiv; Universidad Politécnica de Madrid and Universidad Autónoma de Madrid authors","source_id":"SRC3","source_type":"PRIMARY_RESEARCH","title":"VideoRun2D: Cost-Effective Markerless Motion Capture for Sprint Biomechanics","url":"https://arxiv.org/abs/2409.10175"},{"claims_supported":["The first-party product advertises a continuous sprint velocity curve rather than split times alone.","It reports 2,000 samples per second, claimed ±1 cm distance accuracy, an 80 m range, and coach-shareable reports.","This establishes an existing commercial practice of presenting continuous velocity profiles to coaches."],"publisher":"NovaSpeed","source_id":"SRC4","source_type":"FIRST_PARTY_PRODUCT","title":"NovaSpeed | Precision Laser Speed Measurement","url":"https://www.getnovaspeed.com/"}],"world_novelty_boundary":"This bounded screen found established continuous velocity profiling, step-to-step trunk analysis, video-derived angle curves, and a commercial continuous-velocity product, but no retained source implementing their proposed combination with uncertainty, missing intervals, interruption routing, phase-free blinded cue selection, and direct comparison against fixed splits. That absence supports only an adjacent-prior-art disposition; it does not establish world novelty, patentability, market size, expert acceptance, or realized value."}