Tips for Cycling VO2 Max. Estimates
The success and accuracy of the VO2 max. calculation improves when your ride is a sustained and moderately
hard effort, and where heart rate and power are not highly variable.
• Before your ride, check that your device, heart rate monitor, and power meter are functioning properly, paired,
and have good battery life.
• During your 20 minute ride, maintain your heart rate at greater than 70% of your maximum heart rate.
• During your 20 minute ride, maintain a fairly constant power output.
• Avoid rolling terrain.
• Avoid riding in groups where there is a lot of drafting.
Heat and Altitude Performance Acclimation
Environmental factors such as high temperature and altitude impact your training and performance. For
example, high altitude training can have a positive impact on your fitness, but you may notice a temporary
VO2 max. decline while exposed to high altitudes. Your Edge 540 device provides acclimation notifications and
corrections to your VO2 max. estimate and training status when the temperature is above 22ºC (72ºF) and when
the altitude is above 800 m (2625 ft.).
NOTE: The heat acclimation feature is available only for GPS activities and requires weather data from your
connected phone.
Acute Load
Acute load is a weighted sum of your excess post-exercise oxygen consumption (EPOC) for the last several
days. The gauge indicates whether your current load is low, optimal, high, or very high. The optimal range is
based on your individual fitness level and training history. The range adjusts as your training time and intensity
increase or decrease.
Viewing Your Acute Load
Before you can view your acute load estimate, you must put on the heart rate monitor, install the power meter,
and pair them with your device (
Pairing Your Wireless Sensors, page 43
).
If your device was packaged with a heart rate monitor, the device and sensor are already paired. For the
most accurate estimate, complete the user profile setup (
Setting Up Your User Profile, page 50
), and set your
maximum heart rate (
Setting Your Heart Rate Zones, page 40
).
NOTE: The estimate may seem inaccurate at first. The device requires a few rides to learn about your cycling
performance.
1 Ride at least once during a seven day period.
2 Select
> My Stats > Training Status.
3 Press
to view your acute load.
My Stats
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