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Heart Rate Zone Calculations
% of Maximum Heart
Zone
Rate
1
50–60%
2
60–70%
3
70–80%
4
80–90%
5
90–100%
About VO2 Max. Estimates
VO2 max. is the maximum volume of oxygen (in milliliters) you can consume per minute per kilogram of body
weight at your maximum performance. In simple terms, VO2 max. is an indication of cardiovascular strength
and should increase as your level of fitness improves.
On the device, your VO2 max. estimate appears as a number and description. On your Garmin Connect account,
you can view additional details about your VO2 max. estimate.
VO2 max. data is provided by Firstbeat Analytics. VO2 max. analysis is provided with permission from The
Cooper Institute
®
. For more information, see the appendix
www.CooperInstitute.org.
Getting Your VO2 Max. Estimate
The device requires heart rate data and a timed, (up to 15 minutes) brisk walk or run to display your VO2 max.
estimate.
1 Hold
.
2 Select
> User Profile > VO2 Max.
If you have already recorded a brisk walk or run outdoors, your VO2 max. estimate may appear. The device
displays the date your VO2 max. estimate was last updated. The device updates your VO2 max. estimate
each time you complete an outdoor walk or run of 15 minutes or longer. You can manually start a VO2 max.
test to get an updated estimate.
3 To start a VO2 max. test, tap the screen.
4 Follow the on-screen instructions to get your VO2 max. estimate.
A message appears when the test is complete.
Pulse Oximeter
The D2 Air device has a wrist-based pulse oximeter to gauge the saturation of oxygen in your blood. Knowing
your oxygen saturation can be valuable in understanding your overall health and help you determine how your
body is adapting to altitude. Your device gauges your blood oxygen level by shining light into the skin and
checking how much light is absorbed. This is referred to as SpO
On the device, your pulse oximeter readings appear as an SpO
you can view additional details about your pulse oximeter readings, including trends over multiple days
(Changing the Pulse Oximeter Tracking Mode, page
to garmin.com/ataccuracy.
Heart Rate Features
Perceived Exertion
Relaxed, easy pace, rhythmic breathing
Comfortable pace, slightly deeper
breathing, conversation possible
Moderate pace, more difficult to hold
conversation
Fast pace and a bit uncomfortable,
breathing forceful
Sprinting pace, unsustainable for long
period of time, labored breathing
24). For more information on pulse oximeter accuracy, go
Benefits
Beginning-level aerobic training,
reduces stress
Basic cardiovascular training, good
recovery pace
Improved aerobic capacity, optimal
cardiovascular training
Improved anaerobic capacity and
threshold, improved speed
Anaerobic and muscular endurance,
increased power
(VO2 Max. Standard Ratings, page
.
2
percentage. On your Garmin Connect account,
2
66), and go to
23
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