S health non counting calories properly

[Android Central Question]

My S Health app seems to underestimate the calorie count for exercise since the last big update.
I went for cross-country skiing yesterday with my phone in my pocket. The calorie track at the end of the run was 136 calories for 1 hour (moderate pace), which seemed strange.
After that, I tried the ''enter data'' for 1h of cross-country skiing. The app tells me the calorie count would be 500cal for 1h, which is very far from the 136 I got with the tracking mode.
Same thing happened with kayaking this summer, the calorie count was a lot lower than it should have been.
Anyone has an idea what to do about that?
Thank you!

 

[captkronos]

Has the calorie counting for those exercises ever worked? I use S Health mainly for cycling and running, and haven't noticed any difference recently.