Smoking cigarettes is the cause of so much preventable, deadly disease. But now new research shows sitting for long stretches of time may be just as dangerous.
There was another study about this I spotted recently too (via a Dr Eades Tweet) - Just one day of sitting, even if eating is reduced to compensate, markedly decreases insulin sensitivity
Effects of 1 day of inactivity on insulin action in healthy men and women: interaction with energy intake
Daily activity is a must.