Watch 5 body composition measurement is way off

[Mechajin]

Is there any way to improve the accuracy of the body composition measurement?

I'm a power lifter, so quite big but mostly muscle. Using calipers I have a body fat percentage of 19% but using the watch it thinks I have 31% body fat. That's not just a little inaccurate, that's way off. Up or down 1-2% is no big deal but 12% makes it unusable.

Any way to improve accuracy? 

[Sptzz87]

Try GymRun. It's what I use. It records the workout as "weight machines" or "other" (you choose) + HR + Calories and syncs it to Samsung Health automatically after finishing your sets!