What a camera can see in a box jump
A box jump is scored on vertical hip travel, the time taken by the drive, and the knee angle on landing. Because the box height is unknown to the pipeline, height is expressed as hip travel relative to the athlete rather than in centimetres, which makes it comparable across sessions for the same athlete filmed from the same position. Landing quality has a two-sided threshold: full marks need bent knees within a band, because both a rigid landing and a collapse score badly for different reasons.
How ScoreRep scores a box jump
The rubric declares 4 scored criteria. The strongest single camera angle is the left side view. Every criterion below is available from that angle.
The score is the points earned divided by the points the recorded angle could support, so a clip filmed from a limited angle is never quietly marked down for what the camera could not see. At least 60% of the applicable weight has to be measured before a result is ranked at all.
| Criterion | Points | Measured from the athlete’s pose | Full marks when |
|---|---|---|---|
| Jump height | 40 | vertical travel of the hips across the rep | 0.18 or more |
| Explosiveness | 30 | time taken by the lifting phase | 0.4s or less |
| Landing quality | 20 | smallest knee angle in the rep | 90° to 140° |
| Consistency across the set | 10 | drop in rep speed between the fastest and the slowest rep | 15% or less |
Criteria that depend on the camera angle
These criteria are excluded, not estimated, when the recorded angle cannot support them. That is why the same set filmed twice from different positions can produce two valid scores out of two different totals.
- Landing quality — needs a left side, right side, left oblique and right oblique view.
Does this box jump rep count?
ScoreRep answers that in two separate steps. First, the clip has to read as a box jump at all: every check in the table below has to pass, and a reading the camera could not take counts as a fail, never as a pass. A clip that fails is returned unranked with the reason attached, rather than scored low against the wrong rubric, and no template can override a failed check.
Second, the scoring criteria award points. Falling short of a full-marks threshold costs points, not the rep. Every number here is read from version 1 of the box jump rubric, the same file the scoring engine runs.
- Compare the box jump standard with the other 29 movements on the movement standards page.
- How the rep counter decides between a valid rep and a no-rep, station by station.
| Reading | Has to be | Otherwise rejected because |
|---|---|---|
| Vertical travel of the hips across the rep | 0.08 or more | no jump was detected |
| Largest hip angle in the rep | 165° or more | the hips do not extend on the jump |
| Whether the hands finish above the shoulders | no | the rep finishes overhead, so it is not a box jump |
| Smallest elbow angle in the rep | 100° or more | the elbows bend too much, which reads as a burpee rather than a box jump |
What the recording has to contain
Eligibility decides whether a result can enter a leaderboard. Failing it does not block the feedback — the clip is still scored and returned, but marked unranked with the reason attached, so a bad camera position never silently becomes a bad score.
- A pose has to be detected in at least 50% of the frames.
- The camera angle has to be one of: left side, right side, left oblique, right oblique, front and back.
- At least 1 complete repetition has to be detected.
What is deliberately not scored
Identity, repetition counting, eligibility and the score are derived only from the athlete’s pose. Measurements that come from tracking an external object — the path of a barbell, for example — are drawn on the review overlay but are deliberately outside the scoring contract, so they never affect the number.
Reading the result
Landing is the criterion worth watching across a set. It tends to fall long before jump height does, and a landing score dropping while height holds is the signature of an athlete who should stop the set. Because height here is relative to the athlete rather than absolute, do not compare the number between two people — compare it against the same athlete’s previous sessions.
A technique score is educational feedback about visible movement. It cannot tell you whether a load is safe for your joints, whether pain means something, or whether a programme suits you. Those judgements need a coach or clinician who knows your history.