Landmarks and Phases of a Countermovement Jump
The key landmarks of a Countermovement Jump are:
|Start of Movement
|Point where a 20N threshold is exceeded.
|Start of Braking Phase
|Minimum force until end of eccentric phase.
|Start of Deceleration Phase
|Peak eccentric velocity until end of eccentric phase.
|Start of Concentric Phase
|Zero Velocity until take-off.
|Start of Max. RFD
|Point of steepest concentric force*.
|End of Max. RFD
| Peak take off force*.
|Peak Take-off Force
|Highest force value obtained during the jump (eccentric/concentric phase).
|Point where force is below 30N.
|Point where force rises above 30N.
|Peak Landing Force
| Highest force obtained during landing phase.
The key phases of a Countermovement Jump are:
|Steady phase for weight to be recorded.
|Phase containing negative velocity.
|Sub-phase within eccentric phase: minimum force until end of eccentric phase.
|Sub-phase within eccentric phase: peak eccentric velocity until end of eccentric phase.
|Zero velocity until take-off.
|From take-off until landing.
|Point where force rises above 30N, then eventually returns to bodyweight.