One must at least acknowledge the impact of *social integration* and *close relationships* on longevity, which exceeds that of exercise:

https://www.ted.com/talks/susan_pinker_the_secret_to_living_longer_may_be_your_social_life

Instead of "calories", I would focus more on diet. Since about 1970 the Western diet has transformed rapidly, with greatly increasing amounts of ultra-processed food.

Changing diet is easy, exercise requires effort, and maintaining social relationships requires the cooperation of others.