SPORT::Volleyball (SPOS.VLB)
= repeatable match performance (jump power × timing × ball control × decision × team coordination)
  across training + matches + tournaments,
  while keeping shoulder and knee/ankle load below injury threshold.
Output is “rally reliability” + “late-match execution” + “availability”.

P3
- stable serve/receive under pressure
- consistent approach and landing mechanics
- hitting/setting accuracy holds under fatigue
- shoulder robust; knee/ankle load managed
- team timing (block/defense/transition) reliable
P2
- good early, error-prone late
- serve/receive streaky; confidence-driven swings
- shoulder tightness recurring; patellar/Achilles soreness appears
- timing off with teammates under speed
P1
- frequent missed sessions (shoulder/knee/ankle pain)
- jump decline; approach mechanics degrade
- passing breaks under pressure; “free points” given away
- tactical confusion; transition errors repeat
P0
- significant injury (rotator cuff, patellar tendon, ankle instability) or burnout
- cannot train/compete reliably

Z1 tournament congestion + Z0 sleep debt
→ Z0 jump fatigue + poor landing alignment
→ Z0 patellar/Achilles overload + ankle sprain risk
→ Z0 serve/receive errors spike under fatigue
→ P2 → P1 → P0 (injury + confidence collapse)
Repair: jump/landing governance + shoulder care + serve/receive stability under pressure.

TIMEFLOW::NET_TEAM_FUNCTION
T0–T2: local group games for cohesion + timing/coordination skill display
T3: codified indoor team sport; school/club adoption
T4: national programs + professional leagues + global events
T5: analytics + load management + safeguarding + injury surveillance

VLB::Primitives
PR0 Serve reliability (power + placement + low error rate)
PR1 Serve-receive (first touch quality; platform control)
PR2 Setting precision (tempo, location, decision)
PR3 Attacking: approach mechanics + timing + shot selection
PR4 Blocking timing + hand positioning
PR5 Defense: reading + floor movement + digging mechanics
PR6 Transition speed (defense→attack)
PR7 Jump + landing mechanics (knee/ankle safety)
PR8 Shoulder robustness (serve/spike volume tolerance)
PR9 Team system: rotations, coverage rules, communication

Z0::Top Failure Modes (Volleyball)
FM0.V1 serve errors give free points (low reliability)
FM0.V2 weak serve-receive → offense collapses
FM0.V3 approach timing off → mistimed hits, shoulder strain
FM0.V4 landing mechanics poor → patellar/Achilles/knee pain
FM0.V5 repeated ankle sprains (no full rehab)
FM0.V6 shoulder overuse (high spike/serve volume)
FM0.V7 late-game error streaks (pressure collapse)
FM0.V8 communication gaps → coverage holes
Z0::Sensor Pack (Minimum viable)
S0.V1 serve: in% + error streak count
S0.V2 pass quality: “3-point pass” rate (simple rating) or target-hit rate
S0.V3 jump stress: patellar/Achilles soreness trend + fatigue score
S0.V4 ankle stability: balance test + sprain recurrence
S0.V5 shoulder pain map (0–10) + next-day stiffness
S0.V6 late-set errors: last-10-point error count
S0.V7 sleep/recovery trend (tournament sensitive)
Z0::Repairs
R0.V1 serve ladder: safe serve first, then power/placement
R0.V2 receive micro-dose daily: platform + angle control
R0.V3 approach mechanics coaching + timing reps with setter
R0.V4 landing school: stick landings, knee tracking, decel strength
R0.V5 ankle prehab + progressive return; brace if needed during re-entry
R0.V6 shoulder prehab: cuff/scap + thoracic mobility; spike volume governance
R0.V7 pressure reps: serve/receive under score constraints

Z1::Failure Modes
FM1.V1 training lacks serve/receive pressure realism
FM1.V2 too much jumping volume without recovery management
FM1.V3 poor role clarity in rotations/coverage
FM1.V4 setter-attacker timing not systematized
FM1.V5 tournament weeks not load-adjusted
Z1::Sensors
S1.V1 side-out rate (serve-receive effectiveness proxy)
S1.V2 transition error count (coverage breakdowns)
S1.V3 jump volume trends per athlete (risk)
S1.V4 shoulder complaints trend in hitters/servers
S1.V5 late-set collapse frequency
Z1::Repairs
R1.V1 score-based serve/receive practice with consequences
R1.V2 jump governance: cap high-intensity jumps; rotate stress
R1.V3 rotation/coverage rule cards (simple, repeatable)
R1.V4 timing blocks: setter-hitter reps at match tempo
R1.V5 tournament taper logic + post-tournament deload

Z2::Failure Modes
FM2.V1 youth over-tournaments + over-jumping → tendon injuries
FM2.V2 no strength base (decel/landing weakness)
FM2.V3 selection bias toward height only; skill development neglected
FM2.V4 fragmented support (coach vs physio vs parents)
Z2::Sensors
S2.V1 match density per athlete/season
S2.V2 patellar/Achilles injury days lost
S2.V3 shoulder injury incidence in hitters
S2.V4 dropout/burnout rate
Z2::Repairs
R2.V1 match budget + recovery windows
R2.V2 minimum strength/movement-prep standard (landing/decel)
R2.V3 dual development: skill + athletic base, not height-only sorting
R2.V4 integrated staff loop + parent education

Z3::Failure Modes
FM3.V1 congested schedules (back-to-back matches)
FM3.V2 unsafe floors/venue conditions
FM3.V3 officiating inconsistency affects play safety
Z3::Sensors
S3.V1 injury incidents during tournament clusters
S3.V2 late-event performance collapse (fatigue signal)
S3.V3 venue incident reports
Z3::Repairs
R3.V1 rest minimums between matches + scheduling caps
R3.V2 venue safety standards (floor grip, lighting)
R3.V3 officiating calibration + safety enforcement

STATE::VOLLEYBALL
- ServeReliability SR = in% + error streak trend
- ReceiveQuality RQ = pass quality rate
- JumpStress JS = patellar/Achilles soreness + fatigue trend
- AnkleRisk AR = stability + recurrence trend
- ShoulderRisk ShR = pain + stiffness trend in hitters/servers
- TeamTiming TT = transition errors + coverage breakdowns
- LateSet LS = last-10-point error trend
Phase Estimator:
IF SR stable AND RQ stable AND JS/ShR low AND TT improving → P3 drift
IF JS rising OR ShR rising OR SR/RQ streaky under pressure → P2/P1 warning
IF repeated time-loss injuries or burnout → P0 risk

1) reduce complexity: one safe serve target; one receive platform cue
2) repetition under consequence scoring (miss = point)
3) add fatigue injection (serve/receive after jump sets)
4) add match-like noise (crowd/timer/rotation)
5) lock personal routine: breath + cue + commit

Trigger: tendon pain trend rising >7 days OR morning stiffness
1) reduce jump volume immediately; keep skill work low-impact
2) strengthen: eccentric + isometric tendon protocols
3) fix landing mechanics + decel strength
4) gradual return with jump caps and rest days
5) audit: tournament schedule + sleep/fuel + shoe/support

Trigger: next-day stiffness, pain during hit/serve, loss of range
1) reduce spike/serve volume; keep tactical/receive work
2) prehab: cuff/scap + thoracic mobility daily micro-dose
3) technique audit: sequencing, late contact, over-arching
4) gradual return with volume caps
5) lock recovery baseline and deload weeks

CivOS Link:
- Volleyball is a “high-coupling timing sport”:
  it trains role clarity, trust, and rapid coordination under time pressure.
- Brittleness risk: youth overuse (jump load) + tournament congestion + hidden pain.
- Repair: enforce jump governance, prehab standards, and schedule safety thresholds.