Although using crutches might take some getting used to, it's important to maintain as much physical exercise as your injury allows. The amount of calories you burn will depend on your weight and the length of time you walk on your crutches.
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On average, a 130-lb. person burns 295 calories in one hour walking with crutches, according to NutriStrategy calculations. A person weighing 155 lbs. burns 352 calories per hour; a person weighing 180 lbs. burns 409 calories and a person weighing 205 lbs. burns 465 calories per hour.
If you have been inactive for a while, starting with the least strenuous activities is advised to prevent straining your body. Gradually work up to the American Heart Association's recommendation of at least 30 minutes of moderately intensive activity per day, accumulated in 10- or 15-minute sessions if necessary.
The American Heart Association says that for the disabled, even light-to-moderate intensity activities, performed daily, can have long-term health benefits. Physical activity helps prevent coronary artery disease, diabetes, obesity and high blood pressure. Additionally, keeping your muscles toned will help your body maintain strength and stamina while your injury heals.