The purpose is to protect the rights and welfare of human research subjects (ethics)
The best way to figure out body fat percentage is by looking at muscle separation and muscle definition. Also, looking at vascularity around the body can help narrow it down. Age can also be a factor in figuring out body fat.
I’m really really sorry I needed these points I’m also sorry if you used a video on me
Approximately 50 Percent of the people in the United States who die, do so because of what they do