Should have added this earlier...
BMI tests aren't done with breathing and tubes... it's your weight, height, sex, and age that determine that number (which is a flawed number at best, you shouldn't even use it as a indicator). What you should use is the range of
Body Fat % you have in your
body... which needs to be done by your trainer (if they know how to even use the calipers, or have some digital ineffective methods).
