[gggdvnkhmbgjvbn]

You are right and they are wrong. Sitting for extended periods is correlated with heart disease and other problems regardless of fitness.

I've talked with multiple physical therapists about it and they've been very clear about that distinction. Other commenters here are missing the point.

[skinnymuch]

Hah, cool. Nice to know you've talked to a variety of people.

I myself don't do enough of either so I'm not helping myself enough yet.