Suunto t3 User Manual page 8

physical activity increases, the device will automatically increase your activity class based on your
recorded heart rate information. Your activity class will not be automatically decreased if, for
example, you engage in less strenuous activity, but you should manually decrease your activity
class if you think that it has decreased over time. See the table below for information on determining
your activity class.
Activity description
No regular participation in
recreational sports or heavy physical
activity.
Regular participation in recreation or
work requiring modest physical
activity, such as yard work, nordic
walking or moderate-intensity cycling.
Regular participation in heavy
physical exercise, such as running,
aerobic classes or high-intensity
cycling.
Endurance athlete (Regional level)
Endurance athlete (National level)
6
Always avoid exertion, whenever possible.
Walk for pleasure, routinely use stairs, occasionally
exercise sufficiently to cause heavy breathing or
perspiration.
10 - 60 minutes per week
Over 1 hour per week
Less than 30 minutes per week
30 - 60 minutes per week
1 - 3 hours per week
Over 3 hours per week
5 - 7 hours per week
7 - 9 hours per week
9 - 11 hours per week
11 - 13 hours per week
Activity class
0
1
2
3
4
5
6
7
7.5
8
8.5
9