CanFitPro Personal Training Specialist Practice Test 2025 – Your All-in-One Guide to Top Exam Success!

The equation used to measure the ratio of strength to body mass is 1RM (kg) / body weight (kg). This is because the ratio of 1RM (kg) to body weight (kg) more accurately reflects the true strength-to-body-mass ratio compared to using body weight (kg) as the denominator. Additionally, using lbs instead of kgs in the numerator or denominator, as in options A, C, and D, would result in a different numerical value and thus affect the accuracy of the measurement. Therefore, option B is the most appropriate and precise equation to use for this calculation.