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8.14 Skin Fold Measurement
Test description
The
Powertimer SW-300
supports two methods for calculating
body fat-%: ACSM 7-point method and Durnin & Womersley
4-point method.
Test parameters
Skin Fold Measurement
test has no parameters.
Test sequence
Skin Fold Measurement
test differs from the other tests:
• It has a different user interface as the other tests as shown in
Figure 54.
• It can only be performed once for each subject within a ses-
sion. If you need to do a new skin fold measurement for the
same subject, you must delete the existing or create a new
session.
• It does not need a connection to the
Powertimer Measure-
ment Unit
.
As you measure the points you can type the measurement re-
sults into the value boxes. If you choose the formula prior typ-
ing, you will see only boxes relevant for chosen formula. In
other words, if you start with choosing the DW-4 from the
For-
mula –
list, you will see only the four boxes needed. The re-
sults are in millimeters and the measurement accuracy can be
0,1mm. When enough points have been measured, the for-
mulas can be used to calculate the fat-%. Figure 49 shows
an example of the points required to calculate fat-% using the
ACSM 7-point method. The formulas use the following meas-
urement points
• ACSM uses all points except
Bicep
• D&W uses the
Bicep
,
Suprailiac
,
Subscapular
and
Triceps
points
If you have already measured the fat-% of a subject using
some other means of calculation you can type the fat-% di-
rectly into the
Fat-%
field and ignore the measurements. After
you’re done, tap the
Save & Exit
button to save changes and
return to the previous view.
Figure 54
Skin Fold Measurement
Test results
The measurements typed into the value boxes are stored as
test results when the view is exited. There are three possibili-
ties to handle the results:
• If there are enough measurement results for either the ACSM
or D&W calculations the measurement results are stored into
the database. The fat-% can be calculated later using the
formula that is available.
• If the measurement results cannot be used to calculate the
fat-% but the fat-% has been entered manually to the
Fat-%
value box, then only the fat-% is stored as a measurement re-
sult.
• If the measurement results cannot be used to calculate the
fat-% and the fat-% field is empty or contains the value 0,
then nothing is stored into the database.
8.15 Sprint Analysis
Test description
In
Sprint Analysis
the subject sprints a distance and makes
contacts with the jump mat while sprinting.
Test parameters
Sprint Analysis
has two parameters: The
Distance
of each
sprint and the
Number of Sprints
to be performed in one test
