38
39
TE
ST
S
8
action. Also, the start event of the test (light cell / mat event)
can be changed when editing the Sprint Analysis’s
Test-Spe-
cific Parameters
from
Start Test
– dialog (see chapter 3.2 for
more information about changing the
Test-Specific Parameters
)
Test sequence
The subject sprints through the first photocell and the
Perform-
ing Test
notification is shown. The subject runs to the jump mat
and makes two contacts on the mat. The first contact is used
as the contact time and the second contact is used to calculate
the flight time. The subject may make more than two contacts
if the mat is large, but only the first contact and flight times are
shown. After the subject has done the number of sprints speci-
fied as test parameter the test is considered complete.
If the starting event of the test is set to ‘Start from the mat’, the
test begins when subject makes the first contact on the mat.
Test results
The contact, flight and sprint times are measured and the ve-
locity is calculated from the sprint distance and sprint time. Ve-
locity is shown in meters per second (m/s).
8.16 Static Jump
Test description
The
Static Jump
(SJ) is used to test speed and explosive
strength performance. In the static jump the subject jumps as
high as possible on a jump mat starting his jump with a 90 de-
grees knee angle.
Test parameters
The test has only one parameter: The number of jumps to be
performed in one test action.
Test sequence
The subject starts each jump with a 90-degree knee angle and
performs the number of jumps specified in the test parameters.
If the subject leaves the jump mat before the test is complete,
the
Powertimer SW-300
will show the
Performing Test
notifica-
tion, since it assumes that the subject is jumping. The notifica-
tion will go away if the
Cancel
button is pressed or the 1.5-
second jump timeout elapses.
Test results
Powertimer measures the jump time and calculates
Jump
Height
and
Jump Power
from that. The results of
Static Jump
test are used in the
Counter Movement Jump
Elasticity
and
Static Jump with Extra Weight
Explosive Strength Index
calcu-
lations.
8.17 Static Jump With Extra Weights (Static Jump/
Weight)
Test description
The
Static Jump with Extra Weights
(SJxW) is used to test and
measure explosive strength performance. The test is similar to
the
Static Jump
, but in this case the subject has extra weights
on him.
Test parameters
The SJxW has two parameters: The
Number of Jumps
to be
performed within one test action and the
Extra Load
for the
first jump. The
Extra Load
can be changed before each jump.
Test sequence
Sequence is similar to the
Static Jump
sequence. If you need to
change the
Extra Load
parameter, select the
Change Weight
action from the action list of
Test Performer
view.
Test results
The Powertimer measures the jump times and calculates jump
height and power from that. Also the
Explosive Strength Index
is calculated if the subject has performed the
Static Jump
test.
If you select the
Load-Height Curve
action, you’ll see a graph
that shows the relation between the
Extra Load
and the
Jump
Height
.
