Many of the monks at the monastery near me live into their 90's, many to 100. The 103 year old monk recently died and he could remember names and dates to his dying breath.
They don't eat meat or the "white poisons" such as sugar, white bread, etc. They sleep 7 hours every night and take a nap every afternoon. They live a balanced life of work, prayer and built in time for recreation.
Most of their exercise is similar to yoga, Ti Chi and similar. They never do intervals. A long life is defined mostly by genetics but can be maximized mostly through the elimination of stress, seeking peace.
-Tim-