Calories very low during workouts
- 
 @piotr-grygiel 
 you can also do a dummy activity and already check now if reset helps 
- 
 @freeheeler After a hard reset.      
 I think it’s a clock error. (Belt transmits data after swimming.)
- 
 @piotr-grygiel do you get the zones in the watch logbook? What about calories? 
- 
 @isazi Not. There are only time, temperature and calories on the watch. 
- 
 @piotr-grygiel There is a bug in the watch. Without the belt (with wrist measurement) everything is fine. 
- 
 @piotr-grygiel 
 I’m using a verity sense optical sensor with my S9B and did a short swim on the weekend. 172 Kcal for 15min swim… that’s reasonable in my weight class 
 Do you maybe have the chance to test another HR device when swimming?
 I assume you have correct calorie consumption when doing other activities with your belt?
- 
 Yes I think there is a bug with this. Swimming and hr strap the calories are low. If the jellyfish let me swim this weekend I will check it again to be sure. 
- 
 there seems to be an issue when using HR belt in the water. But I’ve only tried once so far. 
 @Piotr-Grygiel if OHR from the watch works for you, I would recommend using it over the more cumbersome HR belt 
 unless there’s a specific reason why you choose to use the belt?

