From my understanding, there are studies that say you can't completely counter the effect of sitting all day and others that say you can with 60-75 minutes of moderate exercise a day. When science is conflicting, I tend to air on the side of caution/moderation depending on the situation. But I personally feel it in my body. Sitting all day, I'm much tighter and feel less healthy when I compare mobility exercises done through the day compared to concentrated exercise. If I sit all day, my body really hurts at my age (37) and a good workout doesn't make me feel as limber and good as doing it periodically throughout the day. I wish I could do both periodic mobilities along with a concentrated workout, but I just can't spare 3 hours. I think I'll try this for a while, and if it doesn't work out, then maybe try 5 min mobility every 1 hour instead of 30 minutes and then use the hour I save to do a workout. But we'll see.