Jump classification — Docs

Metric Jump watches your jump technique and labels each rep automatically. It detects and classifies five types of jump in real time. Metric Jump is a standalone app, separate from Metric Lift.

Countermovement jump (CMJ)

The CMJ is the default vertical jump test. Put your hands on your hips. Dip down and drive straight back up in one motion, with no pause at the bottom.

CMJ height is a clean test of jumping ability. The heights read lower than a jump mat or a Vertec reach test, and this is expected. An athlete can game a jump mat by tucking the legs on landing, which stretches flight time and inflates the result. A Vertec measures reach as well as jump, so arm length and shoulder and torso mobility feed into the score.

Metric Jump tracks the rise of your centre of mass. This makes it a more pure measure of direct jumping performance, closer to a force plate.

Squat jump (paused)

The squat jump starts from a held squat. Lower to the bottom of your dip. Hold the position for at least 1 second. Jump from a dead stop. The squat jump tests concentric power in isolation and removes the stretch-shortening cycle.

A common cheat on squat jumps is a small dip or bounce before the jump. Metric Jump catches this and labels the rep a CMJ. If the pause wobbles or runs shorter than 1 second, Metric Jump also labels the rep a CMJ.

Abalakov jump

The Abalakov is a two-leg countermovement jump with a full arm swing. The swing adds drive and increases height for most athletes. Compare an Abalakov against a hands-on-hips CMJ to see how much your arm swing adds to height and takeoff velocity. An Abalakov jump needs more coordination and timing than a standard CMJ.

Single-leg jump

A single-leg jump is a jump and a landing on one leg. Metric Jump tracks each side, left or right. Single-leg tests surface left-to-right imbalances in power. This makes them useful for return-to-play screening and asymmetry monitoring. For the per-side comparison, see Composite jump analytics.

Mixed sets

Metric Jump classifies each rep on its own. One jump set can hold several jump types, which feeds composite jump analytics. Metric Jump splits progress charts and personal bests by jump type.

Tip: Jump the way you normally do, or the way your coach instructs. Metric Jump sorts the labels and keeps the history of each type separate.

Edit a classification

Metric Jump can classify a rep wrongly or detect a false rep. You can reclassify that rep or remove it from your data set.

Scroll to the rep table on the jump test summary page.
Update the rep you want to change.