Digital integrated instrument for measuring BMI and comparing to the ideal BMI for age as a guidance for Indonesian military recruitment

This study aimed to investigate body mass index (BMI) of 102 subjects to be Indonesian military officer candidates. To test the ideal body weight (IBW) used 2 methods for comparison, first from the calculation of IBW by Brodsky’s and modified Broca's formula and ideal BMI from WPRO criteria and second from IBW of the Indian Navy and TNI/POLRI recruitment. A digital integrated instrument for measuring BMI was manufactured where BW and body height (BH) are measured using loadcell and ultrasonic sensor respectively and the result is processed by Arduino Mega 2560 microcontroller. From the separate measurement results there are BW error 0.96%, BH error 3.22%, and BMI error 2.88% compared to using digitally integrated measurement.