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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
6 years 11 months ago

My expert guess is 7.8%

Dave Reid
Dave Reid
6 years 11 months ago

Wow, anything left? I’ll guess 7.49

pinebark
pinebark
6 years 11 months ago

6.2

Natalie
6 years 11 months ago

Gosh – uh….%4.3?

lars1000
lars1000
6 years 11 months ago

6.1%

John Fitzgerald
6 years 11 months ago

5.9 %

You look great.

Brian
Brian
6 years 11 months ago

6.6%

arthurb999
arthurb999
6 years 11 months ago

6.4%

Alec
Alec
6 years 11 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 11 months ago

Why are you feeling him, Alec?

jpickett1968
6 years 11 months ago

I’m going with 6.3%

Colin
Colin
6 years 11 months ago

Wow!!!

I’ll go with 6.7%

Chris
Chris
6 years 11 months ago

4.8%

Sharonll
Sharonll
6 years 11 months ago

5.8% ?

Al
Al
6 years 11 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 11 months ago

6.9

Green Onion
Green Onion
6 years 11 months ago

4.2%

Sven Steinkamp
Sven Steinkamp
6 years 11 months ago

about 5.88512349% ?

Jerome
Jerome
6 years 11 months ago

I’m guessing 6.1%

Ben
Ben
6 years 11 months ago

5.3%

Caroline
Caroline
6 years 11 months ago

4.8%

Alex
Alex
6 years 11 months ago

3.14159265%

ah I’m such a nerd…

Christopher
Christopher
6 years 11 months ago

Yes, yes you are.

Ken
Ken
6 years 11 months ago

11.2%

Byung
Byung
6 years 11 months ago

4.9%

CW
CW
6 years 11 months ago

8.5%

Grant
Grant
6 years 11 months ago

7.4%

BNDR
6 years 11 months ago

5.5%

AdamKayce
6 years 11 months ago

7.2%

Joel M
Joel M
6 years 11 months ago

I’m going to guess 10 percent.

Jessi C
Jessi C
6 years 11 months ago

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

Matt
Matt
6 years 11 months ago

Im gonna say 5.8

Tyler
Tyler
6 years 11 months ago

I am going to say 6.4%

neidermeyer
neidermeyer
6 years 11 months ago

7.3%…final answer

pieter d
pieter d
6 years 11 months ago

6.1%

Barry Weidner
6 years 11 months ago

9%

Kristin J
Kristin J
6 years 11 months ago

4.9%

Tom Griesel
Tom Griesel
6 years 11 months ago

5.62%

Steven R. McEvoy
6 years 11 months ago

5.6

mslizzy
mslizzy
6 years 11 months ago

6.3%

Brian
Brian
6 years 11 months ago

5.5

Shamil
Shamil
6 years 11 months ago

6.5%

Mike
Mike
6 years 11 months ago

7.1%

Mike Garcia-Padilla
Mike Garcia-Padilla
6 years 11 months ago

I dont know, but i hate you….

erstad17
erstad17
6 years 11 months ago

I will say….7.21

Krys
6 years 11 months ago

I will guess 7.34%

You look awesome Mark!

Tom Russell
Tom Russell
6 years 11 months ago

3.9

greensgirl
greensgirl
6 years 11 months ago

8.2

primalclubber
primalclubber
6 years 11 months ago

8.3

Ahmed S.
6 years 11 months ago

6.9

Grin & Barrett
Grin & Barrett
6 years 11 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 11 months ago

5.4%

Michael
Michael
6 years 11 months ago

5.9

Laszlo
Laszlo
6 years 11 months ago

8%

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