SPORT::Swimming (SPOS.SWM)
= repeatable swim-race performance (speed × efficiency × endurance × starts/turns)
  across training cycles and meet schedules,
  while keeping shoulder/neck/lower-back load known and below injury threshold.
Output is “time reliability” + “stroke stability under fatigue” + “availability”.

P3
- consistent training continuity (availability high)
- stroke mechanics stable at speed and under fatigue
- pacing reliable; can execute race plan
- shoulders robust; minor niggles resolve
- strong recovery habits (sleep/fuel) despite early sessions
P2
- technique good when fresh, collapses late in sets
- inconsistent times; “good days / bad days”
- shoulder tightness recurring; fatigue accumulates
- starts/turns inconsistent under pressure
P1
- frequent missed sessions; persistent shoulder pain
- technique breaks early; times drift slower
- high perceived effort for normal paces
- motivation volatility, burnout signals
P0
- significant shoulder injury (tendinopathy/impingement/tear), severe burnout
- cannot sustain training; performance regression dominates

Z0 sleep debt + Z0 low fueling (early mornings)
→ Z1 high-volume sets + poor technique under fatigue
→ Z0 shoulder overload + scapular control failure
→ Z2 missed sessions + loss of feel for water
→ P2 → P1 → P0 (chronic shoulder injury / burnout)

TIMEFLOW::SWIMMING_FUNCTION
T0 survival: crossing water, escape, fishing, coastal living
T1 ancient civilisations: military readiness (river crossings), maritime cultures; bathing culture
T2 pre-modern: skill for sailors/soldiers; local contests
T3 industrial: pools, standardized strokes/rules, lifesaving societies
T4 modern: elite performance science + national pride + mass learn-to-swim (safety)
T5 sensor era: technique analytics + load governance + injury prevention + talent pipeline optimization

SWM::Primitives
PR0 Water feel (pressure on forearm/hand)
PR1 Body line control (balance, head/hip alignment)
PR2 Efficient propulsion (catch, pull pattern)
PR3 Kick integration (timing, hip drive)
PR4 Breathing pattern without disrupting line
PR5 Turns + underwater + breakouts (race-critical)
PR6 Starts + reaction + entry
PR7 Pacing skill (split control)
PR8 Shoulder durability + scapular stability
PR9 Aerobic base + race-specific capacity (sprinter vs middle vs distance)

Z0::Top Failure Modes (Swimming)
FM0.S1 “muscle swim” (force without line) → slow + shoulder overload
FM0.S2 poor catch (slipping water) → high effort, low speed
FM0.S3 breathing disrupts body line → hips drop
FM0.S4 kick timing off → drag increases
FM0.S5 over-volume without technique gates → chronic shoulder pain
FM0.S6 weak scapular control + tight lats/pecs → impingement risk
FM0.S7 race plan absent → goes out too fast, dies
FM0.S8 starts/turns neglected → loses free speed
Z0::Sensor Pack (Minimum viable)
S0.S1 weekly meters + intensity distribution (easy vs hard)
S0.S2 session RPE + early-morning sleep hours
S0.S3 shoulder pain map (0–10) + range-of-motion check
S0.S4 “stroke count per length” at easy pace (efficiency proxy)
S0.S5 repeat-set consistency (time drop-off across reps)
S0.S6 turn time proxy (5m-in to 5m-out) occasional test
S0.S7 underwater distance consistency (where applicable)
Z0::Repairs
R0.S1 technique gate: if form breaks, reduce intensity/volume
R0.S2 drill blocks: catch + body line + breathing rhythm
R0.S3 strength/prehab: rotator cuff + scapular stabilizers 2–3×/week
R0.S4 mobility: thoracic spine + pec/lat flexibility
R0.S5 pacing practice: negative split sets + controlled first 50
R0.S6 “free speed” focus: starts/turns micro-dose weekly
R0.S7 sleep protection plan for early sessions

Z1::Failure Modes
FM1.S1 volume-first culture (meters as status) ignoring technique
FM1.S2 too many hard sets; no recovery micro-cycles
FM1.S3 one plan for all strokes/distances
FM1.S4 weak feedback loop (no video, no correction cadence)
FM1.S5 meet schedule crush (too many races too often)
Z1::Sensors
S1.S1 technique stability under fatigue (coach rating + video)
S1.S2 shoulder complaints trend per squad
S1.S3 set completion rate + time decay across reps
S1.S4 intensity distribution (polarization vs “always hard”)
S1.S5 meet-to-meet performance variance
Z1::Repairs
R1.S1 quality-first policy: technique gates + controlled volume
R1.S2 micro-periodization: build weeks + deload weeks
R1.S3 distance/stroke pathways with individualized sets
R1.S4 video review loop (small, consistent)
R1.S5 meet budgeting + taper logic (not constant racing)

Z2::Failure Modes
FM2.S1 early specialization without base mechanics
FM2.S2 burnout from early mornings + school load
FM2.S3 no strength/prehab infrastructure
FM2.S4 fragmented support (coach vs physio vs parent expectations)
Z2::Sensors
S2.S1 dropout / burnout rate by age band
S2.S2 shoulder injury days lost per season
S2.S3 academic stress collisions (sleep debt clusters)
S2.S4 progression curves by stroke/distance (watch plateau)
Z2::Repairs
R2.S1 LTAD gates: mechanics + mobility + strength before high volume
R2.S2 school-season scheduling template (protect sleep)
R2.S3 minimum S&C + prehab standard
R2.S4 parent education: sleep/fuel realism + meet budgeting

Z3::Failure Modes
FM3.S1 excessive meet density (no adaptation time)
FM3.S2 poor warm-up facilities/time (injury + performance risk)
FM3.S3 inconsistent officiating / timing reliability
Z3::Sensors
S3.S1 meet density per athlete/season
S3.S2 injury incidents around meets
S3.S3 timing disputes / DQ anomalies
Z3::Repairs
R3.S1 seasonal meet caps + qualification logic
R3.S2 standard warm-up requirements
R3.S3 officiating calibration + tech reliability standards

STATE::SWIMMING
- Volume V = weekly meters
- Intensity I = hard-set frequency
- Technique Stability TS = stroke count stability + video rating
- Shoulder Risk SR = pain trend + ROM trend
- FreeSpeed FS = start/turn/underwater consistency
- Race Reliability RR = split control + time variance
Phase Estimator:
IF TS stable AND SR low AND RR improving → P3 drift
IF SR rising OR TS collapsing under fatigue → P2/P1 warning
IF availability breaks (missed weeks) → P0 risk

1) reduce intensity temporarily (keep easy volume)
2) rebuild line + catch via drills at controlled pace
3) reintroduce pace in short repeats with perfect form gates
4) extend repeats gradually (maintain form under fatigue)
5) lock weekly video + one correction target only

Trigger: shoulder pain trend rising >7 days OR painful ROM
1) reduce pulling volume; keep kick/aerobic via safer sets
2) prehab daily micro-dose (rotator cuff + scapular)
3) mobility: thoracic + pec/lat; restore mechanics
4) technique correction: avoid crossing midline / overload catch
5) gradual return with gates (pain-free + TS stable)

1) set target splits (A/B/C bands)
2) train negative split sets
3) rehearse start + breakout + first 15m control
4) simplify cues: “line + catch” only
5) post-race review: where split drift began, then re-train that segment

CivOS Link:
- Swimming is dual-use:
  (a) elite projection sport (Z4–Z5)
  (b) population safety + resilience skill (Z0–Z2: drowning prevention)
- Failure risk: youth burnout (early mornings + school load) + shoulder injury epidemics.
- Repair: governance of volume/intensity, sleep protection, prehab standards, meet budgeting.