Daily exercise in “old age”

The article references people in their 70's and 80's. I'm not there yet.

“A mortality reduction of 40% was associated with a moderate use of time (30 minutes, six days a week) irrespective of whether the activity was light or vigorous,” their study said.

Among those who exercised vigorously – defined as hard training several times a week – the lifespan was as much as five years longer than among those who were sedentary.