Garmin Forerunner 630, Owner'S Manual

Ground Contact Time

: The amount of time in each step that 

you spend on the ground while running, measured in 

milliseconds. Ground contact time is not calculated while 

walking.

Heading

: The direction you are moving.

Heart Rate

: Your heart rate in beats per minute (bpm). Your 

device must be connected to a compatible heart rate monitor.

HR %Max.

: The percentage of maximum heart rate.

HR Zone

: The current range of your heart rate (1 to 5). The 

default zones are based on your user profile and maximum 

heart rate (220 minus your age).

Lap %HRR

: The average percentage of heart rate reserve 

(maximum heart rate minus resting heart rate) for the current 

lap.

Lap Cadence

: Cycling. The average cadence for the current 

lap.

Lap Cadence

: Running. The average cadence for the current 

lap.

Lap Distance

: The distance traveled for the current lap.

Lap GCT Bal.

: The average ground contact time balance for the 

current lap.

Lap Ground Contact Time

: The average amount of ground 

contact time for the current lap.

Lap HR

: The average heart rate for the current lap.

Lap HR %Max.

: The average percentage of maximum heart 

rate for the current lap.

Lap Pace

: The average pace for the current lap.

Laps

: The number of laps completed for the current activity.

Lap Speed

: The average speed for the current lap.

Lap Stride Len.

: The average stride length for the current lap.

Lap Time

: The stopwatch time for the current lap.

Lap Vert. Ratio

: The average ratio of vertical oscillation to stride 

length for the current lap.

Lap Vertical Oscillation

: The average amount of vertical 

oscillation for the current lap.

Last Lap Cadence

: Cycling. The average cadence for the last 

completed lap.

Last Lap Cadence

: Running. The average cadence for the last 

completed lap.

Last Lap Distance

: The distance traveled for the last completed 

lap.

Last Lap Pace

: The average pace for the last completed lap.

Last Lap Speed

: The average speed for the last completed lap.

Last Lap Time

: The stopwatch time for the last completed lap.

Maximum Speed

: The top speed for the current activity.

Pace

: The current pace.

Performance Condition

: The performance condition score is a 

real-time assessment of your ability to perform.

Speed

: The current rate of travel.

Stride Length

: The length of your stride from one footfall to the 

next, measured in meters.

Sunrise

: The time of sunrise based on your GPS position.

Sunset

: The time of sunset based on your GPS position.

Temperature

: The temperature of the air. Your body 

temperature affects the temperature sensor.

Time in Zone

: The time elapsed in each heart rate or power 

zone.

Time of Day

: The time of day based on your current location 

and time settings (format, time zone, daylight saving time).

Timer

: The stopwatch time for the current activity.

Training Effect

: The current impact (1.0 to 5.0) on your aerobic 

fitness.

Vertical Oscillation

: The amount of bounce while you are 

running. The vertical motion of your torso, measured in 

centimeters for each step.

Vertical Ratio

: The ratio of vertical oscillation to stride length.

Software License Agreement

BY USING THE DEVICE, YOU AGREE TO BE BOUND BY THE 

TERMS AND CONDITIONS OF THE FOLLOWING SOFTWARE 

LICENSE AGREEMENT. PLEASE READ THIS AGREEMENT 

CAREFULLY.
Garmin Ltd. and its subsidiaries (“Garmin”) grant you a limited 

license to use the software embedded in this device (the 

“Software”) in binary executable form in the normal operation of 

the product. Title, ownership rights, and intellectual property 

rights in and to the Software remain in Garmin and/or its third-

party providers.
You acknowledge that the Software is the property of Garmin 

and/or its third-party providers and is protected under the United 

States of America copyright laws and international copyright 

treaties. You further acknowledge that the structure, 

organization, and code of the Software, for which source code is 

not provided, are valuable trade secrets of Garmin and/or its 

third-party providers and that the Software in source code form 

remains a valuable trade secret of Garmin and/or its third-party 

providers. You agree not to decompile, disassemble, modify, 

reverse assemble, reverse engineer, or reduce to human 

readable form the Software or any part thereof or create any 

derivative works based on the Software. You agree not to export 

or re-export the Software to any country in violation of the export 

control laws of the United States of America or the export control 

laws of any other applicable country.

Heart Rate Zone Calculations

Zone % of 

Maximum 
Heart Rate

Perceived Exertion

Benefits

1

50–60%

Relaxed, easy pace, 
rhythmic breathing

Beginning-level 
aerobic training, 
reduces stress

2

60–70%

Comfortable pace, 
slightly deeper 
breathing, conversation 
possible

Basic cardiovascular 
training, good 
recovery pace

3

70–80%

Moderate pace, more 
difficult to hold 
conversation

Improved aerobic 
capacity, optimal 
cardiovascular training

4

80–90%

Fast pace and a bit 
uncomfortable, breathing 
forceful

Improved anaerobic 
capacity and 
threshold, improved 
speed

5

90–100%

Sprinting pace, 
unsustainable for long 
period of time, labored 
breathing

Anaerobic and 
muscular endurance, 
increased power

VO2 Max. Standard Ratings

These tables include standardized classifications for VO2 max. estimates by age and gender.

16

Appendix