Exercise for time with steady-state exertion has proven to be the ultimate focus supplement for me. Right afterward it is like a very powerful drug. If the exercise isn't at least 30 minutes, I don't feel anything. Somewhere around 38-45 minutes, the music begins to fade in.
My preferred steady state suffering machine is the Concept2 rower. I can keep an eye on stroke/min and cal/hr to stay within a very narrow band of exertion. HIIT and weightlifting are great too, but these are not as strenuous on the brain's "focus for time" circuitry. Lots of downtime and opportunities to get on the cellular device. A straight hour on the rower with the cruise control locked @ 850cal/hr is a totally different kind of animal.
My preferred steady state suffering machine is the Concept2 rower. I can keep an eye on stroke/min and cal/hr to stay within a very narrow band of exertion. HIIT and weightlifting are great too, but these are not as strenuous on the brain's "focus for time" circuitry. Lots of downtime and opportunities to get on the cellular device. A straight hour on the rower with the cruise control locked @ 850cal/hr is a totally different kind of animal.