A friend of mine is a bodybuilder and he uses pullups(palms facing away) as an indicator of bodyfat.He told me if a person can do 20 proper pullups from deadhang,chin clearing the bar, then he is in the 10-12 percentile of bodyfat, if he can do 30 he is in the 5-10 percentile, and 40 is what he always goes for come competition time.
he is 5’10 and competes at 175 pounds.
I think pullups are a good indicator of bodyfat(think about it when you do 30 pullups in a row, youll look good!), but i think some other factors come into play, like strength endurance and type of muscle fibres.
Dude you do know that a percentile is different from a percent. A percentile is a statistical term used to show where you rank compared to the rest, a % is just x/100.
If 20 pullups put you at the 10-12 percentile, then you would prob have to do like 100 to get near the 95th percentile. I think that is ridiculously inaccurate. If anything 20 pullups would put him at the 90th or prob much higher.
On the other hand if what you really meant to say is that 20 straight pullups is a good indicator of a low bodyfat percentage than I would probably have to agree with you, but to think that your friend can actually measure bodyfat on people like saying “oh he can do 25 chins so hes around 7%” or “that guy can only do 3 straight pullups? he must be 20%” is rediculous too. What if that same guy is a skinny-fat chump?
You agree with your friend because “when you do 30 pullups in a row, youll look good!” That isn’t very good logic for explaining how your friend tells a 9%bf person from an 11% bodydat person from just watching them do chinups.