For
Good diet and genetics can be enough for some people.
Against
Movement is essential for heart, muscle, and mental health.
Anonymous excerpts, translated where noted.
“If you eat well you don't really need to exercise that much to be healthy”
“You don't need exercise to be healthy and live long.”
“Exercise/physical activity is essential to healthy body function.”
“Men who never exercise and don't control their diet aren't completely healthy.”