Additionally, heart rate can be elevated by nervousness or dehydration, leading to inaccurate results. Another shortcoming of heart rate monitors is that they are not useful for tracking caloric consumption during activities that do not cause the heart rate to increase, such as many activities of daily living. Unfortunately, the formulas that most heart rate monitors use to measure calories burned have not been compared with more accurate methods, such as indirect calorimetry. Polar, a manufacturer of heart rate monitors, developed a feature known as OwnCal that uses personal information (body weight, height, age, etc.), along with heart rate information to calculate the number of calories burned. Heart rate monitors are commonly used by competitive athletes to assist with their training programs, but certain ones can also provide information on caloric expenditure. Heart rate monitors typically consist of a chest belt that transmits heart rate A popular campaign, the “10,000 step programs”, uses a pedometer to help people achieve the goal of walking 5 miles each day, consuming approximately 500 calories in the process. Pedometers are the least expensive of the devices used to estimate calories burned and can be perfectly adequate if walking or jogging is the primary form of exercise. Additionally, pedometers are unable to provide meaningful caloric information related to activities involving “resistance” such a bicycling or weight lifting. A drawback of the pedometer is that body weight and intensity of walking, important determinants of calories burned, are not taken into consideration. To get an estimate of the calories burned while walking, the number of miles walked is multiplied by 100. For example, a brisk walk for an average 200-pound adult burns about 100 calories per mile. The number of calories that you have burned is estimated from the distance that you have walked. This count is converted into distance by knowing the length of your usual stride.
The word pedometer literally means, “counting footsteps”.
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