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Lack of Exercise
Exercising regularly will help your concentration in a few ways. First, it helps you burn off extra energy or restlessness that can keep your attention jumping around, but a good workout can also increase your capacity to learn and remember (which makes it particularly important for anyone with ADHD).
Heart-pumping exercise is psychologically rejuvenating, but simply moving around can bring measurable improvement in your focus, too. Researchers have found that walking stimulates cognitive function and creativity, which explains why a solitary stroll can help you solve problems or build ideas.
Among other benefits, vitamin D is essential for the proper function of the systems throughout your body. Find out why vitamin D is necessary for your diet.