Drop Jump; Illinois Agility Run - netest Powertimer SW-300 User Manual

Test sequence
The subject makes the jump with help of the counter move-
ment. When the subject lands on the jump mat, the results for
the jump are calculated. If the subject does not land on the
jump mat, a Too long jump notification will be shown after a
brief period of time. The notification will also be shown if the
subject leaves the mat, since Powertimer assumes that the sub-
ject is currently jumping. If the Too long jump notification is
shown, the current jump is cancelled and no results are calcu-
lated.
After the subject has landed on the jump mat and the results
are calculated the subject needs to wait for at least one sec-
ond before starting her next jump. This timeout is needed to
filter away the extra on-mat and off-mat events that usual-
ly come from the jump mat when the subject lands on it. If the
subject starts his jump before the timeout has elapsed, nothing
will happen.
Test results
Powertimer measures the jump time and calculates the follow-
ing results:
• Jump Height in centimeters or inches depending on the re-
gional settings.
• Jump Power in watts.
• Elasticity. Elasticity is calculated from the difference between
the best CMJ and Static Jump results made by the subject
within the same test session.
The best CMJ result is used in the Repetitive Jump Speed-
Strength Endurance Capacity calculation.

8.6 Drop Jump

Test description
The Drop Jump (DJ) is used to test and measure explosive
strength and stretch tolerance performance. In DJ the subject
starts his jump performance on a platform. The subject jumps
from the platform to the jump mat and then jumps as high as
possible.
Test parameters
Drop Jump has two test parameters: Jump Count determines
the amount of jumps to be performed in one test action and
Drop Height determines the drop height for the first jump. The
Drop Height can be changed before a jump if needed by us-
ing the Change Drop Height action of the Test Performer view.
Test sequence
The subject drops from the platform to the jump mat and jumps
on the jump mat. After the subject lands on the mat the meas-
urement results are shown. When the subject leaves the jump
mat to climb back on the platform, the Powertimer assumes
that she is making a jump and shows the Performing test notifi-
cation. The "jump" gets cancelled after a brief period of time
and the subject can then perform a new drop jump.
Test results
Powertimer measures the jump and contact times and calcu-
lates the following results from them:
• Jump Height in centimeters or inches depending on the re-
gional settings.
• Jump Power in watts.
• Relative Power in watts.
• Reactive Strength Index from the relation between the con-
tact and jump times.
You can also view a graph of the relations between Drop
Height and Jump Power by selecting the Drop-Power Curve ac-
tion in the Test Performer view.

8.7 Illinois Agility Run

Test description
The Illinois Agility Run measures the subject's ability to acceler-
ate, stop, change direction and then re-accelerate. This test is
a slalom course in which the total sprint time is measured.
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