AI Jump Analysis Instructions

Capture a clean video, calibrate with athlete height, and turn the jump into actionable technique feedback.

The analysis estimates jump height, countermovement depth, timing, joint angles, and arm coordination. The report is meant to connect the movement you see on screen with specific coaching cues and training exercises.

Open Jump App Back to Homepage

Instructions for recording videos for the Jump app

Capture Setup

Record a clean jump sequence so the app can track the full takeoff and landing.

Step 1: Recommended Settings. Record at 1080p and 60 fps. Vertical or horizontal can work, but the full body must stay visible throughout the rep.
Step 2: The Environment. Use a well-lit area with minimal shadows so the pose model can track the body and the motion remains clear.
Step 3: Camera Setup. Place the camera on a tripod around waist level. Do not hand-hold the phone, because camera shake degrades joint tracking.
Step 4: Positions & Views. A front view is acceptable, but a side view is best because it captures sagittal joint angles more accurately. For approach jumps in volleyball or basketball, move perpendicular to the camera and keep the full motion in frame.

Before running the analysis, enter the athlete height in meters. That value calibrates pixel-to-meter scaling so the app can estimate jump height, center-of-mass travel, and distance-based metrics correctly.

Jump analysis metrics and biomechanical reporting

Metric Breakdown

Read the jump report one metric group at a time.

A sample report might read: estimated jump height 33.1 cm, dip depth 17.7 cm, total CoM range 50.8 cm, and triple-extension spread +378 ms. Those numbers become useful when you understand what each one measures and how it changes the coaching feedback.

Jump Height

33.1 cm

Center-of-mass rise from the initial standing level to the highest point. This is the headline output for explosive vertical performance.

Countermovement Depth

17.7 cm

How far the center of mass drops before the upward reversal. Too shallow can limit force production, while too deep can slow the jump.

Current Phase

Landing

The phase label for the current frame. It helps the athlete understand whether the cursor or frame is in the dip, drive, takeoff, flight, or landing window.

Total CoM Range

50.8 cm

Total center-of-mass travel from the lowest dip to the highest point. This shows the full loading and release range used during the jump.

Amortization

11 ms

Time spent transitioning near the bottom of the countermovement. Shorter transitions usually indicate a more elastic reversal between loading and takeoff.

Triple-Extension Sync

+378 ms

Spread between peak hip, knee, and ankle extension timing. The closer this is to zero, the more coordinated the lower-body power chain is at takeoff.

Extension Velocity

39.1 deg/s

Average peak angular velocity during the concentric drive. This helps quantify how quickly the athlete is extending through the push-off.

Arm Swing Velocity

9.3 m/s

Peak upward wrist speed during the jump drive. Faster, well-timed arms can add momentum and improve takeoff contribution.

Arm Sync

+111 ms

Hip peak minus wrist peak. Near zero is the target because the upper body should reinforce the same instant the lower body peaks.

Arm Block

173°

Shoulder flexion angle at takeoff. This shows whether the athlete finished the arm drive or left upward force on the table.

Concentric Time

489 ms

Time from the upward reversal to takeoff. It reflects how long the athlete spends in the final force-producing phase.

Penultimate Estimate

0.3 cm

Estimated load-in distance into the plant. For approach jumps, this helps show whether the athlete is creating an effective final setup into takeoff.

CoM Drop

1.5 cm

How much the center of mass lowers during the final approach load. This captures whether the athlete is using enough controlled descent before exploding upward.

Bottom Position Angles

Hip 159° | Knee 162°

Hip and knee flexion at the bottom of the dip. These angles show how the athlete organizes the loading position before reversing into the jump.

Individualized Feedback

The coaching section changes based on which metrics are actually out of range.

After the app calculates the movement, it builds a feedback section around the biggest opportunities. The examples below show how the same report turns into specific coaching cues and exercise selections.

Tighten Triple-Extension Timing

Why it appears: hip, knee, and ankle extension are peaking too far apart, as shown by a +378 ms spread. That means the lower body is not unloading as one synchronized chain.

How to coach it: cue the athlete to drive through the floor in one violent sequence instead of extending one segment early.

What to train: loaded jump squats and clean-pull variations to sync the full chain at takeoff.

Finish the Arm Block Earlier

Why it appears: the arm action is not fully contributing at takeoff. With +111 ms arm sync and a 173° arm block, the upper body is arriving late or incompletely.

How to coach it: use the cue "throw the arms to the ceiling" so the upper body peaks with the lower-body drive.

What to train: pair jumps with overhead med-ball scoop tosses to reinforce faster arm timing.

How the Feedback Personalizes

If countermovement depth is too low, the report can shift toward better loading. If amortization is too slow, it will emphasize faster reversals. If bottom angles are too open or too closed, it can push the athlete toward a stronger setup position.

Use the Feedback With Film

The best workflow is to review the numbers next to the video. That lets the athlete see the exact frame where timing drifts, where the dip changes, and whether the arm swing is actually reinforcing takeoff.

Example jump report with individualized improvement focus

How to Use the Report After Each Session

The jump report is designed to drive decisions, not just display numbers. Re-test after a focused block of training and compare the new results against the previous baseline. When jump height rises, timing tightens, and the arm contribution becomes more synchronized, the athlete is turning technique work into measurable power.

Keep athlete height accurate so distance and jump estimates stay calibrated.
Use the same camera angle and similar lighting when re-testing for cleaner comparisons.
Review the individualized feedback first, then prioritize the one or two changes with the largest payoff.

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