Samsung GEAR 2 User Manual page 66

Before You Start Exercising
This app can be used to monitor your exercise. While moderate physical activity, such as brisk walking, is safe
for most people, health experts suggest that you talk with your doctor before you start an exercise program.
Consulting with your doctor ahead of time is a good way to plan an exercise program that is right and safe
for you.
Wearing the Gear 2 Device
When measuring your heart rate, wear the Gear 2 comfortably on your arm above your wrist as shown.
61
<Rear>
Heart rate sensor