Repetitive Jump Test (Repetitive Jump); Take-Off Reaction Test (Trt) - netest Powertimer SW-300 User Manual

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8.12 Repetitive Jump Test (Repetitive Jump)

Test description
Repetitive Jump Test consists of jumps made in serial for a pre-
determined duration, which is determined by time or number
of jumps. The results are used to calculate mechanical power.
Test parameters
Repetitive Jump Test has three parameters:
• Test Duration determines the amount of seconds the subject
keeps jumping in one test action
• Jump Count determines the amount of jumps performed in
one test action
• Test Type is a selection between Test Duration and Jump
Count. If the Test Duration is selected, the test action lasts for
the number of seconds defined by the Test Duration parame-
ter. Otherwise a test action lasts for the number of jumps de-
termined by the Jump Count parameter.
Test sequence
The subject starts jumping and keeps on jumping until the time
has elapsed or the number of jumps has been performed.
Measurement Unit beeps when the test is finished.
If the test is cancelled, it cannot be continued, since Powertim-
er needs to measure the time offset from the first jump for each
jump.
Test results
Powertimer measures the jump and contact times and calcu-
lates the following results:
• Jump Height for each jump in centimeters or inches depend-
ing on the regional settings.
• Jump Offset is the time from the beginning of the first jump to
the end of the current jump in seconds.
• Jump Power for each jump except the first one, since the first
does not have an associated contact time.
• Minimum Power is the power of the worst jump in the test.
• Average Power of the jumps in the test action.
• Relative Power
• Powers for each of the 15-second period of jumps
• Power Decline is the difference between average of the
three first jumps and the average of the three last jumps
• Fatigue Index is the relation between the average of the
three first jumps and the average of the three last jumps
• Speed-Strength Endurance Capacity is the average of the
first 15 seconds compared with the best Counter Movement
Jump result within the same test session.

8.13 Take-off Reaction Test (TRT)

Test description
The Take-off Reaction Test measures the subject's ability to re-
act to a given signal, take-off and accelerate. The subject
has six trials in random order for both directions. The sub-
ject stands in front of the Powertimer Measurement Unit on the
jump mat in ready position. Photocells are placed on each
side of the mat 5 meters away. When the Powertimer Meas-
urement Unit gives a direction signal, the subject reacts and
accelerates through the photocell.
Test parameters
TRT does not have any parameters.
Test sequence
The subject steps on the jump mat and the Performing Test no-
tification is shown on the screen of Powertimer SW-300. After
5-10 seconds either of the lamps is lit and the subject needs to
sprint to the photocell at that direction. The reaction and sprint
times are measured. After the subject has done six trials into
both directions the test is considered complete.
Test results
Powertimer measures the reaction and sprint times and adds
them together to obtain the total time. The first page of results
shows the times for the sprints to the left and the second page
shows the right results. The third page shows the difference
between the left and right results. The side, which has the bet-
ter result, is shown in parenthesis in the Diff % field of the third
page.