There is some evidence that physical exercise may directly improve brain function.
It is proposed by John Medina that this is due to two reasons:
!! Equipment free exercise regime example
Every week day morning for 14 minutes - rest on weekends and holidays.
|Warmup||2 min||14:00||Whole body||Jumping Jacks|
|Circuit #1||1 min||12:00||Upperbody||Press ups|
|1 min||11:00||Core & trunk||Sit ups (lower abbs)|
|1 min||10:00||Lower-body||Squat jumps|
|1 min||09:00||Whole body||Burpees|
|Circuit #2||1 min||07:30||Upperbody||Tricep Dips|
|1 min||06:30||Core & trunk||Stomach crunch (upper abbs)|
|1 min||05:30||Lower-body||Compass jumps|
|Circuit #3||1 min||04:00||Core & trunk||Combined Back extension and chest raise|
|1 min||03:00||Lower-body||Running on the spot|
|Cooldown||2 min||02:00||Whole body||Jumping Jacks|
this podcast from brainscience has an interview with John Ratey about his book "Spark - the revolutionary new science of exercise and the brain", which contains lots of evidence of the benefits of exercise on the brain. John Ratey also has an excellent blog discussing the effect of exercise on the brain.