[hosh]

I thought the same too.

I suspect stress capacity is going to be different for each person, and that capacity might change or shift over time (as a result of physical health, emotional stability, etc.)

Another is that the level of stress (and its attendent tension held in the body) one might be aware of is dependent on how well trained your awareness is.

We could narrow down "stress" by measuring the levels of stress markers in the body, but I think that only gives part of the picture.