I can sit for hours too. The longest time without getting up was similar to Maxxxmodelz, had a deadline, was working through the night, but I only lasted 6.5 hours before I realized that I ran out of diet coke, and it was 5:30am (more caffeeeen).

Typically the longest I sit at the computer is 2 hours. I drink a lot of fluids, so I have to get up to get refills and use the restroom.

But to counter the long periods of sitting, I try to ride (bicycles) or run at least 5 times a week. I also use the mouse with both hands to avoid RMD. I started getting RMD from clicking with the index finger on the right hand too much (20,000 to 30,000 clicks a day).

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