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Athletes flagged for elevated landing risk
3 highlighted
Mia Nguyen high
Both knees bow outward on approach landings — right knee tracks 12.3 cm outside the ankle at 5.8 BW peak landing force.
What we’d runSilent Box Drop
Maya Rodriguez high
Left knee collapses inward on approach landings — left knee tracks 7.9 cm inside the ankle with notable side-to-side asymmetry.
What we’d runTrap Bar Jump
Priya Nair medium
Both knees bow outward on approach landings — right knee tracks 6.0 cm outside the ankle.
What we’d runTrap Bar Jump
1
Injury Risk by Motion
14 athletes · Ranked within each motion category
Jump Landing — ACL & Knee Tracking
2 High · 3 Medium · 9 Low
| Rank | Athlete | Risk | ACL-Risk Finding | Key Metric |
|---|---|---|---|---|
1 |
Mia Nguyen |
high | Both knees bow outward on approach landings — right knee tracks 12.3 cm outside the ankle at 5.8 BW peak landing force. | |
2 |
Maya Rodriguez |
high | Left knee collapses inward on approach landings — left knee tracks 7.9 cm inside the ankle with notable side-to-side asymmetry. | |
3 |
Priya Nair |
medium | Both knees bow outward on approach landings — right knee tracks 6.0 cm outside the ankle. | |
4 |
Jasmine Chen |
medium | 6.0 cm left/right landing asymmetry on countermovement jumps — left knee collapses inward (3.9 cm inside the ankle). | |
5 |
Sofia Martinez |
medium | Hard landings at 4.7× bodyweight on countermovement jumps — left knee collapses inward (3.5 cm inside the ankle). | |
6 |
Hannah Kim |
low | Slight outward drift on right knee, otherwise clean. | |
7 |
Lena Okafor |
low | Slight inward drift on left knee, otherwise clean. | |
8 |
Elena Popov |
low | Slight inward drift on left knee, otherwise clean. | |
9 |
Zoe Hendricks |
low | Slight inward drift on left knee, otherwise clean. | |
10 |
Aaliyah Brooks |
low | Slight outward drift on right knee, otherwise clean. | |
+ |
4 additional athletes — full data in digital dashboard. | |||
Session breakdown: 70 approach-style trials (plant-step, block, attack landings) · 70 vertical CMJ trials. ACL-risk findings weighted toward approach landings, where peak forces and inward knee collapse are highest in volleyball.
2
Monthly Progress by Motion
Feb → Mar → Apr 2026
Most Improved This Month · Overall
Mia Nguyen OPP
+2.4″ jump height · Biggest gains on the team across 2 motion categories
Jump Height Progress
Approach jump vertical · inches
| Athlete | FEB | MAR | APR | Trend | vs Prior Session | |
|---|---|---|---|---|---|---|
Mia Nguyen OPP | 21.5″ | 23.6″ | 26.0″ | +2.4″ | ↑ Best Jump | |
Priya Nair DS/L | — | 15.6″ | 17.6″ | +2.0″ | ||
Sofia Martinez OH | 19.7″ | 22.3″ | 23.9″ | +1.5″ | ||
Maya Rodriguez OH | 14.8″ | 16.1″ | 16.7″ | +0.6″ |
Mia Nguyen
OPP
26.0″Apr · current
Feb21.5″Mar23.6″Apr26.0″
Priya Nair
DS/L
17.6″Apr · current
Feb—Mar15.6″Apr17.6″
Sofia Martinez
OH
23.9″Apr · current
Feb19.7″Mar22.3″Apr23.9″
Maya Rodriguez
OH
16.7″Apr · current
Feb14.8″Mar16.1″Apr16.7″
3
Recommended Team Warm-Up
Muscle-activation prep — no equipment needed · ~10 min
01
Glute Bridge March
Bridge your hips up, then march one knee toward your chest at a time without letting your hips drop. Activates the glutes and core that drive your jump, so the power is already online when you start jumping.
Switches on the glutes and posterior chain before practice so they give full force on your first approach jump — free vertical you'd otherwise leave in the warm-up line.
2 x 8 each leg
No equipment
Targets 8 athletes
02
Lateral Leg Swings
Hold a wall and swing one leg side to side across your body, then switch. Loosens the hips and fires the glute medius on both sides equally, so your weaker leg shows up ready to match the strong one.
Primes both legs evenly so the side that usually lands harder is ready first — the leg that tends to give out first under match fatigue on a one-foot block landing.
2 x 10 each leg
No equipment
Targets 6 athletes
03
Ankle Hops in Place
Small, fast hops on the balls of your feet, staying tall. Wakes up the calves and the ankle reflex that absorbs landing force, so you land soft instead of slamming the floor. Sound like a drumroll, not a thud.
Primes the ankle-calf reflex that soaks up landing force, dropping the peak load that goes through your knees and lower back on every spike landing.
2 x 20
No equipment
Targets 3 athletes
4
Team Practice Plan
4-week program · 2 drills/week
Two practices a week for the next month. Each week pairs one landing-mechanics block with one strength-development block, building from foundation to expression.
Week 1
Foundation
Landing mechanics
Two-Leg Box Drop to Stick
Clean landing habit
Baseline clean-landing pattern for every spike and block — keeps cumulative joint load below the overuse-injury threshold across a full club season.
3 × 8 · Daily warm-up · 12" box
Team-wide
Strength development
Bulgarian Split Squat
Single-leg strength
Forces your weaker side to produce takeoff force on a lateral block approach — the leg that has to launch first when you swing-block off the off-side.
3 × 8 each leg · 2x per week · Bench + dumbbells
Helps 6 athletes
Week 2
Build
Landing mechanics
Silent Box Drop
Soft, quiet landings
Cuts peak spike-landing force toward the safe landing zone — keeps patellar-tendon and lumbar load below the overuse-injury threshold across a full training week.
3 × 6 · Daily · 12-18" box
Helps 3 athletes
Strength development
Broad Jump to Sprint
Horizontal-to-vertical power
Trains horizontal-to-vertical momentum transfer at the penultimate step — a wider plant adds an estimated +4–7 cm of vertical on a 3-step approach attack.
4 × 3 · 1x per week · Open space
Helps 8 athletes
Week 3
Load
Landing mechanics
Single-Leg Step-Down
Even out left and right
Closes the L/R asymmetry that doubles re-injury risk on a single-leg block landing — the weaker side fails first under match-fatigue load.
3 × 8 each leg · Daily · 6-8" box
Helps 6 athletes
Strength development
Box Jump Progression
Max vertical output
Each 2-inch box add carries over to roughly +2.5 cm of true vertical on your approach — linear progression for ~6 weeks before it plateaus.
4 × 4 · 2x per week · Adjustable box
Helps 8 athletes
Week 4
Express
Landing mechanics
Depth Jump to Stick
Controlled force absorption
Trains the stretch-shorten reflex you need to absorb a sharp-angle spike landing in the back row — the same reflex that keeps the knee soft in the 5th-set fatigue zone.
3 × 5 · 2x per week · 18" box
Helps 3 athletes
Strength development
Trap Bar Jump
Explosive power
Builds the ballistic strength that adds an estimated +5–8 cm to your vertical over 8 weeks — pushes a 285 cm spike reach to ~292 cm without changing your approach.
4 × 3 · 2x per week · Trap bar
Helps 8 athletes
How This Was Measured
Method
Markerless 3D motion capture from 3 synchronized GoPro cameras. No suits, no markers, no force plate — athletes move naturally on the training surface.
Biomechanical Model
OpenSim LaiUhlrich2022 (Stanford Neuromuscular Biomechanics Lab). Joint angles cross-checked against the OpenCap open-source markerless benchmark.
Typical Accuracy
Joint angles ±3–5° · knee-ankle tracking ±2 cm — in the same range as the published markerless reliability benchmark (MMPose 2026: 2.1–2.2 cm CoM RMSE, ICC > 0.91 on temporal jump variables) · peak landing force ±20% (COM-acceleration estimate, not force-plate verified).
Not a medical device. BiomechIQ reports summarize movement mechanics for coaching feedback and training decisions — they are not a clinical diagnosis. For any athlete flagged in the red zone, pair this report with an in-person screen by an ATC or PT before making return-to-play or volume decisions.