At my age 70 the level of resting calories should be around 1600 / 1700 per Day by any standards It is actually 780 calories ! Quite impossible. For testing purposes I have modified the age as 40 years ( about 2000 resting calories per day by any standards), it was actually 980 calories.
In both cases it is about half of the normal standard. It is obvouisly wrong. Particularly as this anomaly came with a new watch. Before it was standard.