The body battery is dischargng/recharging according to the stress level measured. And that comes from the heart rate variabilty (HRV). That's why I was asking for both graphs. Since there is no stress level shown for the time of the Golf Activity (no HRV data, though the HR self is present), the battery value does not change.
The question is why there is no HRV data during the Activity. One possibility could be if you used an external HRM for the golf, not supporting the HRV feature. In such ase you'll need a different HRM belt.
Another possibility is a bug in the firmware turning off HRV during golf - in that case contact the Support and report it to them.
