The aim of this study was to analyse the accuracy of the predictive equations of resting metabolic rate (RMR) and daily energy expenditure among rotating police officers. The subjects were 28 healthy police officers aged 23 to 46 in a rotating shift (men). The participants` CMA was measured by indirect calorimetry (TrueOne2400) and also calculated from various predicted RMR equations (Harris-Benedict, Schofield(W)/(WH), FAO/WHO/UNU(W)/(W/H), Cunningham, Mifflin, Liu, Owen, IMNA and Henry(W)/(WH)). The accuracy of these equations was assessed based on a precise prediction (the percentage of subjects whose CMA was predicted within 90% to 110% of the measured CMA), the mean difference, the mean quadratic prediction error, the mean percentage difference, the limits of the Bland-Altman method agreement between the predicted and measured CMA. The measured CMA value of the subjects was 1748 ± 205.9 kcal. Among the predictive equations tested, the Harris-Benedict equation (mean difference: -14.8 kcal/day, RMSPE: 195.8 kcal/day, mean percentage difference: 0.1%) was the most accurate and accurate, but the accuracy in predicting the equation was only 35.7%. The daily energy consumption in the night shift was 3062 kcal, calculated as a multiplication of the CMA by its level of physical activity. Subsequently, the daily energy consumption of the day service was 2647 kcal and the lowest daily energy consumption was 2310 kcal in the holiday service. The daily energy intake of all study participants was 2351 kcal during the day, 1959 kcal in night service and 1796 kcal in holiday service.
The estimated energy requirements of police officers in a rotating shift on day, night and statutory holidays were 2743.6 kcal/day, 2998.6 kcal/day and 2576.9 kcal/day, respectively. These results suggest that the estimated energy demand (EER) of police officers in a rotating layer should be proposed differently by an appropriate equation that can accurately reflect their metabolic state at each shift. *Calculated according to the Heymsfield shape ; † [muscle (kg) / body weight (kg)] × 100; ‡Significant correlation at p < 0.01. Formulas for estimating a CMA for adult males were chosen to calculate the CMA for each subject. The formula for estimating the predictive equation used in this study is presented in Table 1. Your BMR accounts for about 60% to 75% of your total energy expenditure (TTE), depending on your lifestyle and activity level. Total energy expenditure is the total number of calories you burn each day. The rest of your TTE comes from physical activities (walking, talking, eating, etc.) and digesting food.
Physical activity accounts for about 20% of your total energy expenditure, but can vary a bit depending on the frequency and intensity of exercise. Digestion of food, or as some say, postprandial thermogenesis (after eating), uses about 10% of your TTE. BMR tends to decrease with age and with lower lean body mass. On the other hand, increasing your muscle mass will most likely increase your BMR. We`ve written more about the different things that affect basal metabolic rate, in the factors that affect BMR. This BMR calculator is a simple tool that allows you to calculate how many calories your body needs if you were resting all day. Based on your age, height, weight, and gender, the Basal Metabolic Rate Calculator returns your BMR score. Read on to find out what bmr is, how to calculate BMR, learn more about Mifflin St Jeor`s equation and other BMR formulas. We will also show you the differences between calculating the BMR for a man and estimating the BMR for a woman. Once the BMR has been determined using the formula above, the table below will help you calculate your recommended daily intake to maintain your current weight. Daily kilocalori requirement: In terms of the correlation between actual and predicted CMAs, Cunningham`s formula had the highest correlation (r = 0.522), as shown in Table 3.
The result was consistent with the result (r = 0.523) of the study conducted by Lee et al. with male and female university students aged 20 years. Therefore, it is assumed that the age of police officers working shifts is between 20 and 30 years. Those of Chang et al.  A study of female students also found that CMAs calculated from the Harris-Benedict formula, WHO and Cunningham had positive correlations with real CMAs: the Harris-Benedict correlation coefficient (r) is 0.611; The WHO r is 0.676; and Cunninghams r is 0.743. But in this study, Cunningham`s formula (the average percentage difference) overestimated CMAs. The result was similar to that of the study on Korean university students . BMR calculator is short for Basal Metabolic Rate calculator. Basal metabolism is a series of chemical reactions that occur in each person`s body and maintain their state of life. We discussed this topic in detail in the previous paragraph (What is BMR? – BMR Definition).
Knowing what your basal metabolic rate is can help you estimate the minimum amount of calories you need to live, which will help you estimate the total number of calories you should provide to your body on a daily basis. Remember that you need to add your energy expenditure (in calories) from other activities such as walking, speaking, etc. to the number of calories calculated by our BMR calculator. .