In my personal practice I’ve found it helpful to get up from my studies or work every thirty to forty-five minutes and do some exercise … something to get my blood pumping … something that I can complete in two to five minutes. I use this helpful (free) timer to keep me on track.
I’ve found that my concentration levels remain higher, I’m more productive, and I can work much longer over all. I also don’t end up feeling as tired by the end of the day.
You will, of course, need to identify things that work well for you personally (and, of course, consult a doctor if you have any physical issues). The point is to get your heart rate up a bit.
I personally alternate between these exercises…
- push ups
- sit ups
- brisk walking around the block
- jumping jacks
- squats or lunges
- curls (I just use a basic pair of dumbbells I have)
- bench press
- dips (putting my feet on one chair and my hands on two more chairs)
- shadow boxing
You can find demos of many/most of these at youtube.
By the way, there is solid research finding a correlation between exercise and better brain functioning.