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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 Forerunner 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.). You can keep track of your heat and altitude acclimation in the training
status widget.
NOTE: The heat acclimation feature is available only for GPS activities and requires weather data from your
connected smartphone.
Viewing Your Predicted Race Times
For the most accurate estimate, complete the user profile setup (Setting Up Your User Profile, page 28), and set
your maximum heart rate (Setting Your Heart Rate Zones, page 28).
Your device uses the VO2 max. estimate (About VO2 Max. Estimates, page 44) and your training history to
provide a target race time. The device analyzes several weeks of your training data to refine the race time
estimates.
TIP: If you have more than one Garmin device, you can enable the Physio TrueUp
™
feature, which allows your
device to sync activities, history, and data from other devices (Syncing Activities and Performance
Measurements, page 43).
1 From the watch face, select UP or DOWN to view the performance widget.
2 Select START to scroll through the performance measurements.
Your projected race times appear for 5K, 10K, half marathon, and marathon distances.
NOTE: The projections may seem inaccurate at first. The device requires a few runs to learn about your
running performance.
46 Heart Rate Features
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