I find that if I restate someone's argument absurdly and preface my statement with "I agree", people are less likely to see me as an antagonist and more likely laugh at themselves. (This is actually one of my favorite tactics for productive disagreement.)

I think he may have been saying this sarcastically.

I too thought he was being sarcastic, but then I noticed there was a complete lack of smilies and rejected the notion as absurd.

Wait, so, is that comment sarcastic? It has no smileys...

This group collectively gave me the only vocal chuckle I've had today. Thanks :)

Maybe linear would be more appropriate than incremental as in: not all improvements in our lifestyle will have the same impact on our health. If you stand up and move every 20-30 minutes but you eat sugary and fatty food all the time, the improvement of your small breaks will be marginal in the long run compared to all the other problems you'll get. On the other hand, if you sit down all day but eat healthier food (good fat, more proteins, less calories, fibers), the benefits of this lifestyle will be greater.

Stress management and reduction also comes to mind (of course taking a small break and moving around can help that).

I agree. Balanced nutrition is essential for maintaining a healthy lifestyle, not just a sit-stand desk, and "walking around". I would argue that the effects of a sit-stand desk only mask the true, underlying problem of overall poor health choices.

I suspect that was the joke.