Sitting down too often

I keep reading articles and research all over the internet about how sitting down for too long is harmful to your health, regardless of your fitness level and how active you are. I consider myself an active person. I exercise for an hour or more 6 days a week, and my job requires that I'm on my feet all day, moving around and sometimes doing heavy lifting. I also like to stand while I do homework and other tasks at home. On average, I probably spend no more than two or three hours sitting every day. And they're never consecutive. I'll sit or lie down for 30 minutes to an hour and then get back up to do something else. The longest I'll stay seated is usually never more than an hour. Should I be sitting down more often to let my body recover from my workouts, or is a few hours of sitting/lying down every day enough to recover? All these articles portray sitting down as this horrible, life-ending activity (and I get that spending 20 hours a day doing nothing but sitting is unhealthy), but it also seems necessary for people who are fairly active. Not to mention that none of the articles/research mention how long is too long to spend sitting down. I just thought it was interesting and wanted to get some feedback if anyone has an opinion about this.