Garmin 190-01674-00_0B Altimeter and Barometric Readings, % of, Zone, % of, Setup, Fixed, Sensor, Maximum, Maximum, Sensors, Benefits, Benefits, Variable, Altimeter, Heart Rate

Zone	% of	Perceived Exertion	Benefits
	Maximum
	Heart Rate
4	80–90%	Fast pace and a bit	Improved anaerobic
		uncomfortable,	capacity and
		breathing forceful	threshold, improved
			speed

Zone	% of	Perceived Exertion	Benefits
	Maximum
	Heart Rate
5	90–100%	Sprinting pace,	Anaerobic and
		unsustainable for long	muscular endurance,
		period of time, labored	increased power
		breathing

Altimeter and Barometric Readings

The altimeter and barometer function differently depending on the fixed or variable settings. For information about calibrating the barometric altimeter, see Calibrating the Barometric Altimeter. For information about tracking weather changes, see Tracking Weather Changes Overnight.

You can adjust the altimeter and barometric settings by selecting Setup > Sensors > Altimeter > Baro. Plot.

Sensor	Fixed	Variable
Altimeter with GPS On	Elevation is equal to GPS elevation.	Elevation reflects changes in ambient pressure
		and GPS position.
Barometer with GPS On	Barometric pressure reading reflects changes in	Barometric pressure reading reflects changes in
	ambient pressure and changes in GPS position. Using	ambient pressure and changes in GPS position.
	the barometer at a constant altitude results in
	accurate readings.
Altimeter with GPS Off	Elevation remains constant.	Elevation reflects changes in ambient pressure.

Barometer with GPS Off	Barometric pressure reading reflects changes in	Barometric pressure reading is based on the
	ambient pressure. Using the barometer at a constant	calibrated altitude and changes in ambient
	altitude results in accurate readings.	pressure.

Appendix