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How does exercise improve energy?

National Academy of Sports Medicine
National Academy of Sports Medicine
answer

Physical activity will increase your energy levels through many different means. Regular physical activity increases the blood flow to your body and improves your cardiovascular health and fitness. This will allow more blood and oxygen to get to the body providing energy to do work. Regular physical activity also increases production of vital hormones such as thyroid-stimulating  hormone, testosterone, human growth hormone, and catecholamines, all of which help increase your metabolism and give you more energy. Regular physical activity also makes you more efficient at utilizing your body’s stores of fat and sugar for fuel, which allows you to burn them for energy and also helps regulate blood sugar levels and prevent the peaks and valleys that can cause fatigue. All of this will help you see a big increase in energy once you start engaging in regular physical activity.  

RealAge
RealAge
answer
Exercise can do a world of good to boost your energy, so even on days when you don't feel up to it, try to do some kind of physical activity, such as walking, strength training or cardio to kick your feel-good endorphins into high gear. Still uninspired? Try the 10-minute rule. Make a deal with yourself to get moving for at least 10 minutes. Chances are, once you start, you'll feel so much better that you'll keep going.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.