We who are either obsessed with fitness or claim we're just "passionate" like getting tests done. It's usually a good indicator of how you're doing.
For example, a few years ago I got my body fat percentage checked with what's called a Bod Pod.
I wanted to see what my true body fat percentage was, so I booked an appointment with Body Fat USA.
First you have to (obviously) book the appointment. I was told that in Colorado, the use of a DEXA scan requires doctor approval so that needs to happen first (they handle the "doctor approval").
Next, you'll get an email saying you should avoid taking any calcium supplements 24hrs prior to the test and that you should avoid eating big meals 4hrs. before the test.
I read some research on DEXA scan accuracy and found that it tends to be even more accurate if you fast for 24hrs. I fasted for 12hrs which isn't bad considering that my appointment was for 9AM, I just had to stop eating at 9PM which I do almost every night anyways!
Day of the procedure
I showed up with gym shorts and a T-shirt and got my weight and height taken before being shown to some strange looking table with an arm.