Landmarks and Phases of a Squat Jump

The key landmarks of a Squat Jump are:

Landmark Description
Start of Movement Point where a 20N threshold is exceeded.
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.
Take-off Point where force is below 30N.
Landing Point where force rises above 30N.
Peak Landing Force Highest force obtained during landing phase.

The key phases of a Squat Jump are:

Phase Description
Weighing Phase Steady phase for weight to be recorded.
Concentric Phase Zero velocity until take-off.
Flight Phase From take-off until landing.
Landing Phase Point where force rises above 30N and settles back to bodyweight.