Measurement modules

Drop jump

The information about the person, jump type parameter, initial height and repetition sequence number is positioned at the top of the window. The Measurement tab displays the acquired signals as well as the selected cursors, and allows fine cursor positioning. The graph can be zoomed, and viewed along auto-scaled or fixed Y axis. Visible plots are collected in the Plot list. By pressing the Offset button prior to the measurement, the input signal is set to zero. With the Trigger option unchecked, the signal acquisition starts immediately, while it is delayed until the force exceeds a pre-defined value if the Trigger option is selected. The acquisition terminates automatically when the jump is completed, and the cursors are set instantly. Live signals switches between live signal acquisition and the last acquired signal.

The results of the analysis are displayed on the Results tab – in the Current column, which is updated when the T1 (start of contact) cursor is moved. Other columns contain the results of previously saved measurements. The Confirm button saves the parameters of the current jump.

Drop jump measurement
Drop jump measurement
Drop jump measurement
Results of analysis
Results of analysis
See Drop jump video
See video
Gfi Force impulse on interval between T1 and T2
Gft Force impulse computed from fly time
T(G/2) Time between GFI1/2 and T1
XGfi Ratio between force impulse before T/2 and after t/2
XF Ratio between force impulse before Fmax and after Fmax
Hg Height computed from takeoff velocity
Hft Height computed from fly time
T Time between T1 and T2
Pmax/tt Maximal power divided by body weight
W/tt Energy divided by body weight
Pavg50ms/tt Start power divided by body weight
Tpmax Time of maximal power compared to G/2
Tfmax Time between maximal force occurrence and T1
Favg50ms Start force
DJ/SJ Ratio between drop jump height and squat jump height
A50ms Start acceleration
T1 Time between T1 and G/2
T2 Time between G/2 and T2
Gft1 Force impulse on interval between T1 and T/2
Gft2 Force impulse on interval between T/2 and T2
T1F Time between T1 and Fmax
T2F Time between Fmax and T2
Gft1F Force impulse on interval between T1 and Fmax
Gft2F Force impulse on interval between Fmax and T2
Vv Vertical takeoff velocity
T1/2 T/2 - T1
Aavg1 Average acceleration on interval between T1 and T/2
Aavg2 Average acceleration on interval between T/2 and T2
Fmax/tt Maximal force divided by body weight
Favg1/tt Maximal force divided by body weight on interval between T1 and T/2
Favg2/tt Maximal force divided by body weight on interval between T/2 and T2
Vstart Start velocity
FT Time between T2 and T3
Jump status Jump status




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