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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 athletic performance and should increase as your

level of fitness improves. The Forerunner device requires wrist-

based heart rate or a compatible chest heart rate monitor to

display your VO2 max. estimate.

On the device, your VO2 max. estimate appears as a number,

description, and position on the color gauge. On your Garmin

Connect account, you can view additional details about your

VO2 max. estimate, including your fitness age. Your fitness age

gives you an idea of how your fitness compares with a person of

the same gender and different age. As you exercise, your fitness

age can decrease over time.

Purple

Blue

Green

Yellow

Red

VO2 max. data is provided by FirstBeat. VO2 max. analysis is

provided with permission from The Cooper Institute

information, see the appendix

page

17), and go to www.CooperInstitute.org.

Heart Rate Variability and Stress Level

Stress level is the result of a three-minute test performed while

standing still, where the Forerunner device analyzes heart rate

variability to determine your overall stress. Training, sleep,

nutrition, and general life stress all impact how a runner

performs. The stress level range is from 1 to 100, where 1 is a

very low stress state and 100 is a very high stress state.

Knowing your stress level can help you decide if your body is

ready for a tough training run or yoga.

Using the Stress Level Widget

The stress level widget displays your current stress level and a

graph of your stress level for the last several hours. It can also

guide you through a breathing activity to help you relax.

While you are sitting or inactive, select UP or DOWN to view

the stress level widget.

Select START.

• If your stress level is in the low or medium range, a graph

appears showing your stress level for the last four hours.

TIP: To start a relaxation activity from the graph, select

DOWN > START, and enter a duration in minutes.

• If your stress level is in the high range, a message

appears asking you to begin a relaxation activity.

Select an option:

• View your stress level graph.

NOTE: Blue bars indicate periods of rest. Yellow bars

indicate periods of stress. Gray bars indicate times when

you were too active to determine your stress level.

• Select Yes to start the relaxation activity, and enter a

duration in minutes.

Heart Rate Features

Superior

Excellent

Good

Fair

Poor

. For more

(VO2 Max. Standard Ratings,

• Select No to bypass the relaxation activity and view the

stress level graph.

Body Battery

Your device analyzes your heart rate variability, stress level,

sleep quality, and activity data to determine your overall Body

Battery level. Like a gas gauge on a car, it indicates your

amount of available reserve energy. The Body Battery level

range is from 0 to 100, where 0 to 25 is low reserve energy, 26

to 50 is medium reserve energy, 51 to 75 is high reserve energy,

and 76 to 100 is very high reserve energy.

You can sync your device with your Garmin Connect account to

view your most up-to-date Body Battery level, long-term trends,

and additional details

(Tips for Improved Body Battery Data,

page

9).

Viewing the Body Battery Widget

The Body Battery widget displays your current Body Battery

level and a graph of your Body Battery level for the last several

hours.

Select UP or DOWN to view the Body Battery widget.

NOTE: You may need to add the widget to your widget loop

(Customizing the Widget Loop, page

Select START to view a combined graph of your Body

Battery and stress level.

Blue bars indicate periods of rest. Orange bars indicate

periods of stress. Gray bars indicate times that you were too

active to determine your stress level.

Select DOWN to see your Body Battery data since midnight.

Tips for Improved Body Battery Data

• Your Body Battery level updates when you sync your device

with your Garmin Connect account.

• For more accurate results, wear the device while sleeping.

• Rest and good sleep charge your Body Battery.

• Strenuous activity, high stress, and poor sleep can cause

your Body Battery to drain.

• Food intake, as well as stimulants like caffeine, has no

impact on your Body Battery.

12).