How does the body increase the amount of oxygen to the muscles during exercise

When muscles are working, they take oxygen out of blood three times as well as when muscles are at rest. The body can increase the flow of oxygen-rich blood to working muscle in several ways: local blood flow to the working muscle is increased. blood flow from nonessential organs is diverted to the working muscle.

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20 times a minute is usually the average respritory rate of an adult. additionally the patient is breathing on his own, is clearly maintaining his airway, and is intaking a sufficient amount of air. you shouldn't use a bag valve mask, cpap, or other form of positive pressure ventilation, unless the patient has lost control of his airway, and is not breathing (apneic) or has rapid breathing or slow and shallow respirations. this patient would most likely and should be put on an non-rebreather mask or nrb attached to 100% high flow oxygen at 15 l/min. don't use a nasal cannula, as the amount of oxygen it provides is limited with a rate of 6 l/min.