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

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Bill
Bill
7 years 28 days ago

My expert guess is 7.8%

Dave Reid
Dave Reid
7 years 27 days ago

Wow, anything left? I’ll guess 7.49

pinebark
pinebark
7 years 28 days ago

6.2

Natalie
7 years 28 days ago

Gosh – uh….%4.3?

lars1000
lars1000
7 years 28 days ago

6.1%

John Fitzgerald
7 years 28 days ago

5.9 %

You look great.

Brian
Brian
7 years 28 days ago

6.6%

arthurb999
arthurb999
7 years 28 days ago

6.4%

Alec
Alec
7 years 28 days 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
7 years 27 days ago

Why are you feeling him, Alec?

jpickett1968
7 years 28 days ago

I’m going with 6.3%

Colin
Colin
7 years 28 days ago

Wow!!!

I’ll go with 6.7%

Chris
Chris
7 years 28 days ago

4.8%

Sharonll
Sharonll
7 years 28 days ago

5.8% ?

Al
Al
7 years 28 days ago

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

Joel B.
Joel B.
7 years 28 days ago

6.9

Green Onion
Green Onion
7 years 28 days ago

4.2%

Sven Steinkamp
Sven Steinkamp
7 years 28 days ago

about 5.88512349% ?

Jerome
Jerome
7 years 28 days ago

I’m guessing 6.1%

Ben
Ben
7 years 28 days ago

5.3%

Caroline
Caroline
7 years 28 days ago

4.8%

Alex
Alex
7 years 28 days ago

3.14159265%

ah I’m such a nerd…

Christopher
Christopher
7 years 27 days ago

Yes, yes you are.

Ken
Ken
7 years 28 days ago

11.2%

Byung
Byung
7 years 28 days ago

4.9%

CW
CW
7 years 28 days ago

8.5%

Grant
Grant
7 years 28 days ago

7.4%

BNDR
7 years 28 days ago

5.5%

AdamKayce
7 years 28 days ago

7.2%

Joel M
Joel M
7 years 28 days ago

I’m going to guess 10 percent.

Jessi C
Jessi C
7 years 28 days ago

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

Matt
Matt
7 years 28 days ago

Im gonna say 5.8

Tyler
Tyler
7 years 28 days ago

I am going to say 6.4%

neidermeyer
neidermeyer
7 years 28 days ago

7.3%…final answer

pieter d
pieter d
7 years 28 days ago

6.1%

Barry Weidner
7 years 28 days ago

9%

Kristin J
Kristin J
7 years 28 days ago

4.9%

Tom Griesel
Tom Griesel
7 years 28 days ago

5.62%

Steven R. McEvoy
7 years 28 days ago

5.6

mslizzy
mslizzy
7 years 28 days ago

6.3%

Brian
Brian
7 years 28 days ago

5.5

Shamil
Shamil
7 years 28 days ago

6.5%

Mike
Mike
7 years 28 days ago

7.1%

Mike Garcia-Padilla
Mike Garcia-Padilla
7 years 28 days ago

I dont know, but i hate you….

erstad17
erstad17
7 years 28 days ago

I will say….7.21

Krys
7 years 28 days ago

I will guess 7.34%

You look awesome Mark!

Tom Russell
Tom Russell
7 years 28 days ago

3.9

greensgirl
greensgirl
7 years 28 days ago

8.2

primalclubber
primalclubber
7 years 28 days ago

8.3

Ahmed S.
7 years 28 days ago

6.9

Grin & Barrett
Grin & Barrett
7 years 28 days 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
7 years 28 days ago

5.4%

Michael
Michael
7 years 28 days ago

5.9

Laszlo
Laszlo
7 years 28 days ago

8%

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