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Let me introduce myself. My name is Mark Sisson. I’m 63 years young. I live and work in Malibu, California. In a past life I was a professional marathoner and triathlete. Now my life goal is to help 100 million people get healthy. I started this blog in 2006 to empower people to take full responsibility for their own health and enjoyment of life by investigating, discussing, and critically rethinking everything we’ve assumed to be true about health and wellness...

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December 22, 2009

Contest: Guess My Body Fat Percentage

By Mark Sisson
360 Comments

Before we get to today’s actual post, I have a challenge. At the risk of sounding like a carny barker, guess my body fat and win a Damage Control Master Formula. The winner will be the one who, before tomorrow’s post, guesses what the “gold standard” hydrostatic test showed my body fat percentage to be – to the nearest tenth of a percent without going over. (Submit your best guess in the comment board.) If several people guess the same number, we will draw a winner from that group. Malibu gym members are specifically excluded from this competition (’cause that’s where I had the test done). This photo was taken around the same time.

UPDATE: THIS CONTEST IS NOW CLOSED

Find out who won the contest and learn the value of lab values by clicking here.


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360 Comments on "Contest: Guess My Body Fat Percentage"

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Bill
Bill
6 years 9 months ago

My expert guess is 7.8%

Dave Reid
Dave Reid
6 years 9 months ago

Wow, anything left? I’ll guess 7.49

pinebark
pinebark
6 years 9 months ago

6.2

Natalie
6 years 9 months ago

Gosh – uh….%4.3?

lars1000
lars1000
6 years 9 months ago

6.1%

John Fitzgerald
6 years 9 months ago

5.9 %

You look great.

Brian
Brian
6 years 9 months ago

6.6%

arthurb999
arthurb999
6 years 9 months ago

6.4%

Alec
Alec
6 years 9 months ago

No matter the number, you do look awesome. More importantly, you feel awesome!

6.4%

I bet someone will go all Price is Right and guess 0.1%.

Christopher
Christopher
6 years 9 months ago

Why are you feeling him, Alec?

jpickett1968
6 years 9 months ago

I’m going with 6.3%

Colin
Colin
6 years 9 months ago

Wow!!!

I’ll go with 6.7%

Chris
Chris
6 years 9 months ago

4.8%

Sharonll
Sharonll
6 years 9 months ago

5.8% ?

Al
Al
6 years 9 months ago

Great photo! Very motivational.
I would guess 5.7%
Never been near that myself, but still trying. Stay strong!

Joel B.
Joel B.
6 years 9 months ago

6.9

Green Onion
Green Onion
6 years 9 months ago

4.2%

Sven Steinkamp
Sven Steinkamp
6 years 9 months ago

about 5.88512349% ?

Jerome
Jerome
6 years 9 months ago

I’m guessing 6.1%

Ben
Ben
6 years 9 months ago

5.3%

Caroline
Caroline
6 years 9 months ago

4.8%

Alex
Alex
6 years 9 months ago

3.14159265%

ah I’m such a nerd…

Christopher
Christopher
6 years 9 months ago

Yes, yes you are.

Ken
Ken
6 years 9 months ago

11.2%

Byung
Byung
6 years 9 months ago

4.9%

CW
CW
6 years 9 months ago

8.5%

Grant
Grant
6 years 9 months ago

7.4%

BNDR
6 years 9 months ago

5.5%

AdamKayce
6 years 9 months ago

7.2%

Joel M
Joel M
6 years 9 months ago

I’m going to guess 10 percent.

Jessi C
Jessi C
6 years 9 months ago

I would have to guess 5.8%. You look amazing!!

Matt
Matt
6 years 9 months ago

Im gonna say 5.8

Tyler
Tyler
6 years 9 months ago

I am going to say 6.4%

neidermeyer
neidermeyer
6 years 9 months ago

7.3%…final answer

pieter d
pieter d
6 years 9 months ago

6.1%

Barry Weidner
6 years 9 months ago

9%

Kristin J
Kristin J
6 years 9 months ago

4.9%

Tom Griesel
Tom Griesel
6 years 9 months ago

5.62%

Steven R. McEvoy
6 years 9 months ago

5.6

mslizzy
mslizzy
6 years 9 months ago

6.3%

Brian
Brian
6 years 9 months ago

5.5

Shamil
Shamil
6 years 9 months ago

6.5%

Mike
Mike
6 years 9 months ago

7.1%

Mike Garcia-Padilla
Mike Garcia-Padilla
6 years 9 months ago

I dont know, but i hate you….

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[…] Original post by Mark Sisson […]

erstad17
erstad17
6 years 9 months ago

I will say….7.21

Krys
6 years 9 months ago

I will guess 7.34%

You look awesome Mark!

Tom Russell
Tom Russell
6 years 9 months ago

3.9

greensgirl
greensgirl
6 years 9 months ago

8.2

primalclubber
primalclubber
6 years 9 months ago

8.3

Ahmed S.
6 years 9 months ago

6.9

Grin & Barrett
Grin & Barrett
6 years 9 months ago

I have a really cool computer program, BF 123, that analyzes digital pictures and gives you the bodyfat percentage. Hah, just kidding of course. My expert eye tells me you are at 6.3%.

Curiousfarmer
Curiousfarmer
6 years 9 months ago

5.4%

Michael
Michael
6 years 9 months ago

5.9

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