{
  "schema": "NEXT11_RESOLVED_EXERCISE_V1",
  "status": "V632_R6_LATERAL_LUNGE_NEUTRAL_KNEE_TRACK_WIP",
  "resolvedExerciseId": "lateral-lunges__warmup_lateral_lunge_ik_v1__v632-r6-neutral-knee-track",
  "exerciseId": "lateral-lunges",
  "profileId": "warmup_lateral_lunge_ik_v1",
  "sourceRuntimeVersion": "NEXPROD01_RUNTIME_V346_COLLISION_RECEIVER_AXIS_CANONICALIZATION_2026_08_20",
  "playbackRuntimeVersion": "NEXPROD01_RESOLVED_PLAYBACK_V632_R6_LATERAL_KNEE_TRACK",
  "createdFromCheckpoint": "V414_LATERAL_LUNGE_EXACT_TRAVEL_SEQUENCE",
  "sampling": {
    "mode": "V414 exact traveling sequence + surgical V415 deformation-chain right-foot release cleanup",
    "sampleCount": 720
  },
  "playbackTiming": {
    "durationSec": 4.5,
    "loop": true,
    "sourceClipDurationSec": 12.680013,
    "method": "V630 R2 source-first retiming + exact-frame contact preservation + body-part phase separation"
  },
  "authoringEvidence": {
    "geometryAuthority": "warmup_lateral_lunge_ik_v1 ancestry + explicit source-conformity correction reviewed before bake",
    "sourceFilm": "NEXT11_dynamic_warmup_ijj7TD0DA6Q_lateral-lunges.mov",
    "changes": [
      "narrow gathered neutral",
      "reduced bottom stance width",
      "pelvis over bent leg",
      "natural downward arm reach",
      "explicit lateral step lift before plant",
      "standing gather between sides"
    ],
    "liveSolverCalls": 0,
    "newSolver": false,
    "newIkProfile": false,
    "base": "V410 plant-foot authority",
    "v409Changes": [
      "foot/ankle plant corrected away from heel-loaded posture using verified V407 standing-foot orientation as neutral authority",
      "root/pelvis translates left after right-knee lunge so rise finishes over the previous left-foot position",
      "travel continues leftward rather than returning to original center"
    ],
    "v410Changes": [
      "V409 foot/ankle correction preserved unchanged",
      "left foot is positional authority from right-knee bottom through rise",
      "root/pelvis translation is derived so gathered stand occurs over the prior planted left-foot location instead of applying generic leftward root drift"
    ],
    "v411Changes": [
      "cycle phase rotated 0.5 so the first working leg matches the source film",
      "motion-space root travel retained verbatim in motionSpaceModelTransform",
      "display-space modelTransform removes only cumulative travel using V408 local root curve, preserving visible lunge side-shift while keeping Nex centered"
    ],
    "geometryChanges": "none",
    "footChanges": "none",
    "plantFootChanges": "none",
    "v412Changes": [
      "unwrapped the hidden V411 motion-space reset introduced by the 0.5 start-side phase rotation",
      "added baked cameraTrackX derived from motionSpaceX - preserved V411 displaySpaceX",
      "declared per-loop cycle displacement so travel and camera never teleport when animation phase wraps",
      "left all bone quaternions, V410 foot authority and V411 display-space lunge geometry unchanged"
    ],
    "sourceVideo": "assets/media/exercises/lateral-lunges/source/NEXT11_dynamic_warmup_ijj7TD0DA6Q_lateral-lunges.mov",
    "v413Changes": [
      "source film contact order made authoritative: trailing right foot stays planted while left steps out; left stays planted while right gathers",
      "correct V411/V412 left-leading half-cycle repeated twice instead of alternating to an opposite in-place lunge",
      "full XYZ planted-foot drift removed with a baked root/contact correction derived from actual Nex FBX foot readback",
      "accepted source-side animation is repeated; only the free right leg receives a baked 35 mm swing-clearance arc through the established generic fixed-endpoint two-bone rebuild",
      "no live solver and no new exercise-specific runtime solver"
    ],
    "contactAnchors": {
      "rightStart": [
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      "leftLoaded": [
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      "strideXYZ": [
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    "v414Changes": [
      "restored missing right-lunge phase before gather",
      "both feet position+orientation locked through left-to-right lunge transfer",
      "right foot only gathers after right lunge while left foot remains planted",
      "left foot only steps outward after gather while right foot remains planted",
      "V413 explicit-contact travel/camera architecture retained",
      "no runtime IK; no new solver"
    ],
    "sequenceAuthority": "lunge left -> lunge right -> right foot gathers to left -> left foot steps out -> repeat",
    "v415Changes": [
      "V414 sequence, geometry, timing, planted-foot authority, root travel and camera-follow preserved",
      "only deformation-chain R_Thigh/R_Calf/R_Foot quaternions patched during release frames 351-375",
      "R_Foot world path now leaves the right-lunge plant once and continuously; initial downward micro-stamp removed",
      "R_Foot world orientation is continuous through the release; duplicate attachment R_Foot bone is untouched",
      "no runtime IK; no new solver"
    ],
    "v415JointWhitelist": [
      "R_Thigh#29",
      "R_Calf#30",
      "R_Foot(parent=R_Calf)#33"
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    "v425": {
      "baseAsset": "assets/nexprod/resolved/lateral-lunges-v415-clean-right-foot-release.resolved.json",
      "baseSha256": "3dd17603d449312a93d6b90f0fcb3e0171478287e407802b7b5ee1c58c142c8c",
      "changedBones": {
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        "R_Forearm": 720,
        "R_Hand": 720
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      "newSolver": false,
      "liveSolverCalls": 0,
      "humanVisualAcceptance": "PENDING"
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    "v630R2": {
      "base": "assets/nexprod/resolved/lateral-lunges-v425-contact-corrected.resolved.json",
      "visualAuthority": "locked V6.29 19C",
      "timing": "shorter lunge holds; continuous source-like transfer/gather/step cadence",
      "bodyDynamics": "lower body/root leads; torso/arms/head use bounded phase offsets only during movement",
      "footAnkle": "V425/V415 explicit planted-foot and clean release authority preserved by exact-frame lower-body/root sampling; no fractional contact interpolation",
      "noRandomNoise": true,
      "cameraPlayerUnchanged": true,
      "newSolver": false,
      "liveSolverCalls": 0
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    "v630R3": {
      "base": "assets/nexprod/resolved/lateral-lunges-v630-natural-dynamics-r2-contact-preserved.resolved.json",
      "sourceAuthority": "lateral-lunges MOV",
      "changes": [
        "R1/R2 natural timing retained",
        "body-part phase separation retained",
        "right gather free-foot lift increased",
        "left step-out gets source-like knee/foot clearance",
        "opposite planted foot/root untouched",
        "no random sway/noise"
      ],
      "maxAddedLiftM": {
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      "base": "V630 R3 athletic swing",
      "changes": [
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        "phase-separated torso/arms/head",
        "athletic gather/step foot clearance",
        "subtle swing-foot dorsiflexion",
        "planted foot/contact and travel authority unchanged"
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      "peakSwingDorsiflexDeg": -5.999942875185548,
      "noRandomNoise": true,
      "newSolver": false,
      "liveSolverCalls": 0
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    "v632R6": {
      "purpose": "Remove sequential medial knee snap during free-foot gather/neutral return while preserving exact foot endpoints and existing travel/contact authority.",
      "method": "offline two-bone rebuild using sagittal pole vector; only free-leg thigh/calf/foot chains in two swing windows",
      "windows": [
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      "metrics": [
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          "side": "R",
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          "maxFootResidualMm": 0.000033513306930292484,
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      "event": {
        "segment": "left_lunge_arrival",
        "side": "left",
        "sourceTimeSec": 4.941,
        "travelXOffsetM": -0.2,
        "v410PlantFoot": null,
        "v410RootCorrectionM": 0.251422,
        "v411SourceFrame": 539,
        "v411StartSidePhaseShift": 0.5,
        "v411DisplayCompensationX": -0.251422,
        "sourceEquivalentTimeSec": 1.640833,
        "v412ContinuousMotionX": 0.1,
        "v412CameraTrackX": -0.000169683,
        "v413RepetitionIndex": 1,
        "v413RepetitionFrame": 179,
        "v413PlantedFoot": "R_Foot",
        "v414PlantedFoot": "BOTH",
        "v414CycleFrame": 718,
        "naturalDynamics": {
          "schema": "NEXT11_V630_LATERAL_R2_CONTACT_PRESERVED",
          "sourceFirstTiming": true,
          "segment": "left_lunge_arrival",
          "segmentU": 0.991987,
          "sourceFrame": 718.415,
          "phaseOffsetsFrames": {
            "spine": 0.126,
            "arms": 0.277,
            "head": 0.076
          },
          "principles": [
            "reduced static holds",
            "continuous COM/weight-transfer timing",
            "lower-body leads upper-body",
            "arm follow-through",
            "head stabilization",
            "existing explicit foot-contact authority preserved",
            "no random sway/noise"
          ]
        }
      },
      "motionSpaceModelTransform": [
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        -0.154380078,
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        0,
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        0,
        1,
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        0.010162
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      "presentation": {
        "schema": "NEXT11_CAMERA_RELATIVE_PRESENTATION_FRAME_V1",
        "motionSpaceX": 0.789150613,
        "cameraTrackX": 0.68898093,
        "displaySpaceX": 0.100169683,
        "floorWorldAnchorX": 0,
        "invariantResidualM": 0,
        "segment": "left_lunge_arrival",
        "side": "left",
        "v414PlantedFoot": "BOTH",
        "v414CycleFrame": 718
      }
    }
  ],
  "validationMetrics": {
    "phaseShift": 0.5,
    "startSide": "left",
    "displayRootXRangeM": [
      -0.099830317,
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    ],
    "motionRootXRangeM": [
      -0.099830317,
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    "maxDisplayCompensationM": 0.251422,
    "v410BoneQuaternionsPreservedExactly": true
  },
  "displaySpace": {
    "mode": "centered_travel_compensation",
    "motionSpaceTruthField": "frames[].motionSpaceModelTransform",
    "displaySpacePlaybackField": "frames[].modelTransform",
    "principle": "Biomechanical travel remains true in motion space; display root subtracts cumulative travel so Nex remains centered while local lateral-lunge displacement is preserved.",
    "backgroundSuggestion": "scroll_floor_grid opposite motion-space travel",
    "keepNexCentered": true
  },
  "presentationMotion": {
    "schema": "NEXT11_V414_EXACT_TRAVEL_SEQUENCE_CAMERA_FOLLOW_V1",
    "axis": "model_x",
    "cycleTravelX": 0.437539567,
    "durationSec": 4.5,
    "repetitionsPerCycle": 1,
    "repetitionDurationSec": 4.5,
    "repetitionTravelX": 0.437539567,
    "contactSequence": [
      "BOTH planted: lunge left",
      "BOTH planted: shift/lunge right",
      "L_Foot planted: R_Foot gathers to L_Foot",
      "R_Foot planted: L_Foot steps outward",
      "BOTH planted: next left lunge"
    ],
    "phasePolicy": "Exact sequence authority from user/source film. No extra steps and no foot movement between left and right lunges.",
    "displayEquation": "displaySpaceX = motionSpaceX - cameraTrackX",
    "cameraPolicy": "baked camera follows travel while preserving visible local left/right body shift",
    "mobilePolicy": "fully baked interpolation; zero live solver calls",
    "releasePolicy": "R_Foot plant -> one continuous unload/lift -> gather -> plant beside L_Foot; no pre-release down-up pulse"
  }
}
