Exercise improves memory and concentration. Schools here now have kids go on a stationary bike for a few mins before lessons to help them concentrate on lessons

Exercise improves memory and concentration. Schools here now have kids go on a stationary bike for a few mins before lessons to help them concentrate on lessons. Personally I will ride a bike for 20 minutes as fast as possible to get heart rate up, shower, then have no problem concentrating on streaming lectures or working through a technical paper for the next couple of hours whereas before I would always have my mind wander and not get anything done. Doing pullups/anything that builds your core also helps your back, so sitting for a while isn't uncomfortable. If you don't have an exercise bike just run in place, or do anything else to get your heart rate up before you try and concentrate.