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From Fellrnr.com, Running tips
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Walking in a race has a lot of advantages
* Running burns more calories per mile than walking, so walking is more efficient. (Generally, for paces up to around 14 min/mile, walking is more efficient. For paces faster than 12 min/mile, running is more efficient. Paces between 14 and 12 min/mile are not so clear cut.)
* Walking has a lower heart rate[[Heart Rate]], which allows the body to burn more fat than carbohydrate. (You have a lot of fat, but carbohydrates are a limited resource) * The lower heart rate [[Heart Rate]] of walking also makes digestion easier. The digestive system needs blood and oxygen; if it is all being used by the muscles, you will have a problem.
* It is much easier to take off or add clothes when walking, or adjust other bits of equipment.
* The lower intensity of walking gives a more relaxed [[Breathing]] pattern, making it easier to eat and drink.
