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| Variable | Abbreviation | Practical Interpretation |
|---|---|---|
| Theoretical maximal vertical force (intercept) production extrapolated from the linear loaded countermovement jump F-v relationship | Absolute F0 (N) Relative F0 (N.kg-1) |
Maximal concentric force output in the vertical direction per unit of body mass. Describes the athlete’s force capability to project the centre of mass in the vertical direction. |
| Theoretical maximal movement velocity (intercept) extrapolated from the linear loaded countermovement jump F-v relationship | v0 (m.s-1) | Maximal movement velocity in the vertical direction during the countermovement jump. Describes the athlete’s ability to produce force at high velocities in the vertical direction. |
| Maximal mechanical external power output in the vertical direction (Pmax = F0 x v0/4) | Absolute PMAX (W) Relative PMAX (W.kg-1) |
Maximal external power-output capability during the concentric action of the countermovement jump per unit of body mass. |
| Slope of the force-velocity relationship | Absolute SFV (N.s.m-1) Relative SFV (N.s.m-1.kg-1) |
Index of an athlete’s individual balance between force and velocity capabilities. The more negative the value, and steeper the F-v slope, the more force-dominant the athlete is. |
| Jump height | JH (m) | The maximal centre of mass displacement achieved during the flight phase of the countermovement jump. |
| Flight time | FT (sec) | Ariel time of the athlete between ‘take-off’ until ‘landing’ in the countermovement jump. |
| Take-off velocity | TOV (m.s-1) | The maximal movement velocity at the conclusion of the propulsion phase |