A single soft shell crab is also high in cholesterol at 79 mg per serving or around 26 percent of the daily recommended intake of cholesterol. According to the American Heart Association, dietary cholesterol intake should be limited to 300 mg per day for the average adult.
However, walking is an excellent long-term weight-loss exercise. You can easily walk thousands of miles over decades, because walking has a very low injury risk. How many calories you burn on a one-mile walk depends on your speed and weight.
Based on a 150-pound person, 30 minutes of moderate-speed walking burns about 160 calories. This figure varies depending on the person's weight and his total speed; a 125-pound person burns about 135 calories in 30 minutes walking 4 mph, whereas a 185-pound person burns about 200 calories.