Lode BV
Excalibur Sport
59
In this example the screen shows that this is the first step, T= 00:59 so the duration of this
step is 59 sec, the timer is showing 1 sec of total exercise time, the timer will stop the
registration when the RPM drops below 30. The workload P is 10 watt, the pedalling
frequency is 58 RPM, and the heart rate is 83 beats per minute. The three displayed
parameters are those selected under SYSTEM PARAMETERS / SET DISPLAY (see System
parameters menu B.3.6). At the bottom line you will find the recovery button on the left and
right which will bring the workload immediately to the programmed recovery workload. In
case the optional BPM is installed you will find instead of the right recovery button a BPM
button which allow you to measure the blood pressure with the optional automatic blood
pressure module (see the appendix concerning Bloodpressure in this user guide).
The next step will automatically follow:
The screen shows the second step, the remaining time of this step (T= 00:48), the total
exercise time (t=01:12; step 1 and 12 seconds of step 2), the workload in step 2 (P=20 W), the
pedalling frequency (61 RPM) and the heart rate of 91 beats per minute.
8.4.1.B.3.8.3.1
Åstrand protocol
The Åstrand protocol is default preprogrammed and can be selected in the menu Protocol
Run. The Åstrand protocol is the most often used submaximal protocol for estimation of the
VO
2
max, longitudinal follow-up of individuals and for determination of averaged VO
2
max
of a group. In order to use this protocol you will need the HR option and enter the age, gender
and bodyweight of the test subject. During the Åstrand test the test subject has to cycle for 6
minutes on a submaximual workload. To reach the desired workload the protocol will start
default with 50 watt/min. When the target heartrate of 170 minus the age is reached the
workload will not increase anymore. This step will be held for 6 minutes. This step is
automatically followed by a recovery step. The average heartrate between the 5th and 6th
minute (which is supposed to be around 190 minus the age) is used to estimate the VO
2
max
afterwards. The following formulas are used:
For male:
VO2-maxmale = (174.2 * W1 + 4200) / (103.2*HRaverage – 6299) [l/min]
For female:
VO2-maxfemale = (163.8*W1 +3780) / (104.4*HRaverage – 7514) [l/min]
Correction factors for age are if age is below 17 years:
corr_lftage<17 = -0.027*age+1.461
and for age equal or above 17 years:
corr_lftage
≥
17 = -0.008*age+1.134
which gives for the VO
2
-max value:
VO
2
-maxage_corrected = VO
2
-max * corr_lft
VO
2
-max values are often expressed in [ml/(min.kg)] so the weight [kg] of the test subject
needs to be incorporated, resulting in:
VO
2
-maxper_kg = 1000*VO2-max / weight [ml/(min.kg)]
Execute the Åstrand protocol
2 t=00:48
θ
=01:12
P= 20W 61 rpm
♥
= 91/min
rec rec
Summary of Contents for 925900
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