I think how well you can get "into the zone" while being physically active depends partly on how physically active you are to be begin with. If your body is no

I think how well you can get "into the zone" while being physically active depends partly on how physically active you are to be begin with. If your body is not used to cycling or walking on a treadmill, then you're going to find it difficult to multitask when doing that activity. I have used a bike desk for more than a decade. I have no difficulty getting into the zone; in fact, I find the rhythmic motion actually helps. You can get far more exercise while you work than you can in your free time, simply because time spent working > available free time for most people. It all depends on how long and how much you exert yourself. Based on my desk's power meter, I burn about 1200 calories/day while I work.