Monark 839 E, Руководство пользователя

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Monark Ergomedic 839 E
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7.2 Menu 1: Fitness test
7.2.1 Åstrand - Protocol
The Astrand protocol is designed to determine
maximal oxygen consumption by exercising the
subject at a submaximal workload and measur-
ing the steady state heart rate. The workload, in
conjunction with the resultant heart rate, is com-
pared to the predicted relationship, adjusted for
age and sex and a maximal oxygen consumption
is computed.
The protocol defines nine workloads at which
the subject may be evaluated. The workloads for
male subjects span 300 kpm/min to 1500 kpm/
min in 150 kpm/min steps. The workloads for
females cover 300 kpm/min to 900 kpm/min in
75 kpm/min steps.
The workload selection is preformed manual-
ly during the first two minutes of the test. The
workload should be difficult enough to elicit a
steady heart rate of at least 120 bpm. If too high
a workload is chosen, the subject may not be able
to complete the minimum of six minutes neces-
sary to reach steady state conditions. The proto-
col has been designed to test individuals with a
normal mechanical efficiency during steady state;
very high workloads can only be preformed aero-
bically by individuals with a very high work ca-
pacity.
During the workload selection interval, the wor-
kload should be increased until the heart rate va-
ries no more than 4bpm and is consistently grea-
ter than 120 bpm.
At the end of the fifth minute, the heart rate is
recorded. If, by the end of the next minute, the
heart rate is within 4 bpm of the previous obser-
vations, the protocol is finished. If not, the test
continues until the pulse rate has been within 4
beats for one minute. Note: If the heart rate is
erratic or the workload is improperly adjusted
for steady state exercise, the test will fail to com-
plete. Of course, the protocol may be interrupted
by the START/STOP key, although the error mes-
sage “Test Aborted” and no calculation of V02
max will result.
The maximum oxygen consumption is obtained
through the look up of the steady state heart rate
and workload in the appropriate male or female
table of “Predicted V02 Max from Heart Rate
and Workload”. This estimate is then multiplied
by a factor which is related to the age of the sub-
ject. The factor is found in the following table
according to the predicted maximum heart rate:
Performance:
Instruct subject about the protocol and adjust •
the chest belt for reliable pulse.
Setup subject data according to the menu. See •
menu Astrand test.
Select ASTRAND and push key 3 = start. •
V02 Correction Factor
Maxpuls Factor
over 200 1.12
191-200 1.00
181-190 0.93
171-180 0.83
161-170 0.75
151-160 0.69
less than 151 0.64
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