Which equation is commonly used to calculate Basal Metabolic Rate (BMR)?

The Mifflin-St Jeor equation is commonly used to calculate Basal Metabolic Rate (BMR) because it is widely recognized for its accuracy and applicability to a broad population. This equation takes into account factors such as age, sex, weight, and height, which are critical in estimating the energy expenditure at rest. Research has shown that the Mifflin-St Jeor equation provides a more precise estimate of BMR compared to older equations, making it a preferred choice among health professionals for assessing metabolic rates.

In contrast, while the Body Mass Index equation serves as a tool for assessing body weight in relation to height, it does not directly provide an estimate of metabolic rate. The Katch-McArdle equation focuses on lean body mass to calculate calorie expenditure, which is useful but less commonly applied than the Mifflin-St Jeor equation. The Owen equation, although valid, is primarily used in specific circumstances and is less prevalent in general practice for BMR calculation. Thus, the Mifflin-St Jeor equation stands out as the most commonly used method for BMR assessment among the available options.