Running is a popular exercise. Estimates place the numbers of joggers at just over 33 million.

Running:

• increases elimination of toxins
• increases oxygenation of cells
• improves blood transport
• improves lung capacity
• reduces body fat
• increases muscle
• strengthens legs, muscles, and bones

Even though it is a high-impact exercise, if done properly it can entail very little risk. You should warm up before you run to prevent strains and sprains. Warming up causes muscles and tendons to become more flexible and to elongate to accommodate the longer range of motion required for running.

Watch for warning signs of injury. Pain in the knee, hip, and ankle are indicators that serious injuries are possible unless care is taken.

Burning pain in the muscles while exercising and extended cramping after exercising are also indications that the exercise is too strenuous. Pain that persists for more than 48 hours should be checked by a physician.

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