SPORT::Swimming (SPOS.SWM)
= repeatable race performance (technique efficiency × aerobic base × speed × pacing × start/turn skills)
  across training blocks and meet schedules,
  while keeping shoulder/neck/back overuse risk below threshold.
Output is “time reliability + split reliability + season availability”.

P3
- technique holds under fatigue (efficient stroke, stable body line)
- pacing and splits reliable; race plan executed
- starts/turns consistent; underwater phases efficient
- shoulder health stable; low recurrence pain
- training continuity high; peaks scheduled
P2
- good swims early, deteriorates late
- stroke rate rises but speed doesn’t (efficiency leak)
- pacing errors; dies late in races
- recurring shoulder tightness; occasional impingement symptoms
- meet performance variable
P1
- frequent missed sessions due to shoulder pain or fatigue
- technique regresses; “muscling” replaces form
- chronic inflammation; motivation swings
- performance stagnates; high perceived effort at normal times
P0
- significant shoulder injury/burnout
- cannot train/compete reliably

Z1 volume spike + poor technique under fatigue
→ Z0 shoulder overload + efficiency leak
→ Z0 pain increases → compensation → worse mechanics
→ Z2 missed sessions + lost fitness and feel
→ P2 → P1 → P0 (shoulder injury cascade)
Repair: reduce volume, rebuild technique at low intensity, reintroduce load with form gates and shoulder prehab.

TIMEFLOW::SWIMMING_FUNCTION
T0 survival: crossing water, fishing, escape, rescue
T1 ancient civilisations: naval/river cultures; military and trade; survival competence
T2 pre-modern: local contests; lifeguarding/sea readiness
T3 industrial: codified strokes and race formats; clubs + pools
T4 modern: elite training systems + sport science + national projection
T5 sensor era: stroke analytics, lactate/pacing models, shoulder injury surveillance, safeguarding for youth volume

SWM::Primitives
PR0 Body line + balance (reduce drag)
PR1 Catch mechanics (propulsive efficiency)
PR2 Kick timing and stability (stroke-dependent)
PR3 Breathing pattern control (oxygen vs rhythm stability)
PR4 Stroke rate vs distance-per-stroke control (efficiency)
PR5 Starts + turns + underwater phases (time-critical)
PR6 Aerobic base (training volume tolerance)
PR7 Speed and speed endurance (race-specific)
PR8 Pacing model (splits; controlled early speed)
PR9 Shoulder robustness (rotator cuff/scapular control) + load governance

Z0::Top Failure Modes (Swimming)
FM0.SW1 technique collapses under fatigue (drag rises)
FM0.SW2 shoulder impingement from high volume + poor catch
FM0.SW3 “spin rate”: higher stroke rate without speed gain
FM0.SW4 poor breathing control → panic rhythm
FM0.SW5 weak starts/turns → loses free speed
FM0.SW6 pacing errors (goes out too fast, dies)
FM0.SW7 under-fueling → poor recovery and adaptation
FM0.SW8 no deload weeks → chronic fatigue
Z0::Sensor Pack (Minimum viable)
S0.SW1 shoulder pain map (0–10) + next-day stiffness
S0.SW2 stroke efficiency: distance per stroke (DPS) proxy or stroke count per length
S0.SW3 rate-control: stroke rate vs split trend
S0.SW4 split stability across sets (pace decay)
S0.SW5 start/turn consistency: breakout distance + turn times (simple)
S0.SW6 weekly volume + intensity sessions count
S0.SW7 recovery: sleep + fatigue score
S0.SW8 fueling proxy: appetite/energy + post-session intake
Z0::Repairs
R0.SW1 technique-first sets: quality reps at controlled pace
R0.SW2 shoulder prehab: cuff/scap daily micro-dose; correct catch mechanics
R0.SW3 “hold speed with fewer strokes” drills (efficiency constraint)
R0.SW4 breathing pattern training under pace
R0.SW5 start/turn micro-blocks (5–10 min every session)
R0.SW6 pacing practice: negative split sets; race-pace blocks
R0.SW7 fueling baseline: carbs around training + protein after
R0.SW8 deload every 3–4 weeks (common safe cadence)

Z1::Failure Modes
FM1.SW1 volume-only culture without technique gates
FM1.SW2 too many hard sets/week (fatigue debt)
FM1.SW3 insufficient race-pace specificity
FM1.SW4 starts/turns neglected (free time lost)
FM1.SW5 shoulder warning signs ignored
Z1::Sensors
S1.SW1 shoulder complaint incidence after spike weeks
S1.SW2 efficiency leak: stroke count rises at same pace
S1.SW3 pace decay within key sets
S1.SW4 meet performance variance vs training markers
S1.SW5 attendance continuity (missed sessions)
Z1::Repairs
R1.SW1 technique gates: stop set when form collapses
R1.SW2 intensity cap: hard sessions/week limited; easy truly easy
R1.SW3 block periodization: base → build → race pace → taper
R1.SW4 starts/turns built into every week (not optional)
R1.SW5 shoulder SOP: pain threshold triggers load reduction + technique audit

Z2::Failure Modes
FM2.SW1 youth over-volume and early specialization → shoulder injury/burnout
FM2.SW2 inadequate dryland strength/mobility support
FM2.SW3 unhealthy weight/fueling culture
FM2.SW4 fragmented support (coach vs physio vs parents)
Z2::Sensors
S2.SW1 shoulder injury days lost
S2.SW2 dropout/burnout rate
S2.SW3 volume and intensity density by age band
S2.SW4 progression: technique and speed improvements vs health signals
Z2::Repairs
R2.SW1 age-appropriate volume caps + mandatory deloads
R2.SW2 minimum dryland standards (cuff/scap + trunk/hips)
R2.SW3 nutrition education + safe fueling policies
R2.SW4 integrated support loop + parent education

Z3::Failure Modes
FM3.SW1 congested meet schedules reduce recovery
FM3.SW2 travel + sleep disruption impacts performance
FM3.SW3 warm-up pool access inadequate
Z3::Sensors
S3.SW1 shoulder flare-ups around meet clusters
S3.SW2 performance collapses across multi-day meets
S3.SW3 warm-up access incident reports
Z3::Repairs
R3.SW1 schedule buffers and rest windows
R3.SW2 travel buffers + sleep protection protocols
R3.SW3 warm-up facility/time standards

STATE::SWIMMING
- Volume V = weekly meters/hours
- IntensityDensity ID = hard sets/week
- ShoulderRisk SR = pain + stiffness trend
- Efficiency E = stroke count/DPS at given pace
- PaceStability PS = set pace decay trend
- Skills SK = start/turn consistency metrics
- Recovery Rec = sleep + fatigue trend
Phase Estimator:
IF SR low AND E improving AND PS stable AND SK improving → P3 drift
IF SR rising OR E leaking (more strokes, same speed) OR PS decays → P2/P1 warning
IF shoulder injury/burnout stops training → P0 risk

Trigger: pain trend rising >7 days OR next-day stiffness increases
1) reduce volume immediately; remove painful stroke elements
2) technique audit: catch depth, crossing over, impingement positions
3) cuff/scap prehab daily micro-dose + thoracic mobility
4) rebuild with low-intensity technique sets
5) gradual return with volume/intensity caps; deload enforced

1) lock body line and catch cue (1–2 cues only)
2) constraint sets: hold pace with stroke-count cap
3) reintroduce race pace only after efficiency stabilizes
4) integrate breathing pattern under pace
5) re-test with timed repeats: speed with fewer strokes

1) set split targets (A/B/C) for each race distance
2) train negative-split sets (controlled early, strong finish)
3) race-pace blocks with short rest (specific tolerance)
4) start/turn focus to preserve free speed
5) post-race review: where the drift started, then retrain that segment

CivOS Link:
- Swimming is “volume governance + technique integrity”:
  it shows how high-throughput training collapses without technique gates and recovery buffers.
- Brittleness risk: youth over-volume + hidden shoulder pain → irreversible drift.
- Repair: volume caps, daily technique KPIs, and mandatory shoulder prehab standards.