CrossFit | 21-15-9 Story

Formula for Fitness

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ByCrossFitSeptember 15, 2021

On this noteworthy day — the 15th day of the 9th month of the 21st year — it’s important to look back and note the cultural significance that the 21-15-9 rep scheme has had not only on CrossFit culture but also on culture at large. It’s not just a date or a series of numbers; it’s a feeling in all of us.

If you’re familiar with CrossFit, you are undoubtedly familiar with Fran and Fran lung. But do you know where the rep scheme came from?

If we visit the CrossFit.com message board, a 2003 post from Tom Corrigan offers some perspective on the dreaded 21-15-9.

“The decreasing nature refers to the ‘decay-rate’ experienced by people who do them with a fixed weight,” he wrote. “You do the first set of 21, and when you do the set of 15, your strength has ‘decayed’ such that the 15 feel about as hard as the 21. When you do the final 9, it feels as hard as the 15.”

It’s an elegant expression of the CrossFit methodology and a surefire way to maximize output and power while building mental toughness: All you have to do is get through the next set, which has fewer reps than the one before.

“This is manageable; you can do this,” you think after the set of 21.

Then comes the set of 15. Sure, it’s less work, but veteran CrossFit athletes will tell you it’s the nastiest set. It’s the make-it-or-break-it set for those seeking a PR, or generally, increased fitness and overall health. Once you get to the 9, just hold on and don’t stop.

But what does the rep scheme mean in the broad cultural sense? According to CrossFit Games Competition Director Adrian Bozman, “It’s iconic.”

“It’s the calling card of someone who is in the know of CrossFit culture,” he said. “You’re not going to see a 21-15-9 in a Gold’s Gym when someone is body building. You’re not going to see it at a group exercise class at Bally’s Fitness. It’s a secret handshake in some ways.”

To the innocent bystander, the numbers are benign. To the indoctrinated, it elicits a visceral reaction. It’s a right of passage that only those who have endured can truly know.

At the same time, it transcends the walls of the CrossFit affiliate. CrossFit is widely known throughout not just the fitness world but also in pop culture. The 21-5-9 rep scheme is not entry to an exclusive club, but it is something you cannot fully grasp unless you have tasted the feeling.

“It’s a standard,” explained Seminar Staff Flowmaster James Hobart.

Everyone remembers their first time doing Fran — and the first time they did it as prescribed. Odds are your time wasn’t anything near the fastest in the gym, but that’s not what’s important. Progressing from a PVC pipe and scaled reps to a barbell and the full complement of reps in Fran means you were able to increase your relative intensity. Your fitness is now greater than it was before.

“It’s intensity,” Hobart said. “Not exclusive but inspirational.”

Another cornerstone of the CrossFit methodology is excellence: finding the tip of the spear. The CrossFit Games provide a metric to find the Fittest on Earth, but for what reason? For some, it’s entertainment, but for all who partake in the shared suffering of CrossFit, it’s inspiration for what is possible.

CrossFit athletes are “bonded by a common pain and a common goal,” CrossFit Games veteran Val Voboril said in 2012.

We see what the best can accomplish, and that drives us to challenge our perceived limitations. You earn a badge of honor after you’ve done Fran for the first time as prescribed. Your confidence and sense of accomplishment grow with every ripped callus and pound lost. You build your buffer against sickness as you reduce A1C levels, improve blood pressure, and get off medications such as Metformin.

And what makes all this work? Intensity. The cornerstone of the CrossFit methodology.

By reducing reps as the workout goes on, you can keep the intensity up.

“That was a real point,” Bozman said. “Keeping intensity as high as it could be (and) both the physical and psychological effects of it on an athlete.”

21-15-9 hurts — and makes you better for it.

Comments on 21-15-9 Story

7 Comments

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Grant Shymske
September 18th, 2021 at 12:46 am
Commented on: 21-15-9 Story

Never Forget: https://youtu.be/-2nsZ9Lbz-8

Weird to have a 21-15-9 tribute without referencing Coach.

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Jacob Seymour
September 20th, 2021 at 4:17 pm

It isn't weird. It's intentional and predictable. While not weird, it is certainly disgusting to be ashamed of the man who started it all. It is hypersensitive individuals who are ashamed and insecure of people with unpopular opinions. People in charge now are obsessed with enforcing inclusivity and political correctness, which means any people group or demographic who collectively hold a generally uniform opinion which is different from a given individual will be highly favored such that the individual suddenly is guilty of punishable bigotry (etc.) and exclusivity - hypocritically falling into a position of unwelcoming diverse perspectives. If felons are released from prison, then perhaps somebody like Coach, who has done so much objective good, should be released likewise from the prison of unforgiveness and judgement others put him in.

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Felipe Camargo de Freitas
September 16th, 2021 at 9:36 am
Commented on: 21-15-9 Story

Que top ler isso, a poucos dias atrás um aluno me questionava algo semelhante a esse nessa nossa linha de repetições ímpares.

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Wade Aubin
September 16th, 2021 at 2:56 am
Commented on: 21-15-9 Story

The 21-15-9 rep scheme came from Fran. Look up the origin of Fran on YouTube. Glassman says something like, “I don’t know where it came from but I did 21 reps of each, then 15, then 9, and then threw up all over the garage floor…”

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Luiz Carlos Marques
September 16th, 2021 at 1:48 am
Commented on: 21-15-9 Story

My niver 15/09/21 40 anos, muito feliz por conhecer o CrossFit, mudou minha vida!

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Clay Jones
September 16th, 2021 at 1:45 am
Commented on: 21-15-9 Story

I had the opportunity to spend a summer abroad in China, in grad school back in 2011. Fran was my first wod in 2008 and I was curious about the rep #s. While in China, we toured so much but there was a circular three step stone structure of some sort. The first step was built with 21 stones around. The second step 15 stones. The top step 9 stones.


I thought “maybe this rep count has some deep-seeded Chinese influence” for all of these years.


This post just debunked that theory.


Well written. As always.

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Chris Doster
September 16th, 2021 at 1:56 am

Not sure it actually debunks your theory. There still may be a correlation to that Chinese stone structure?? As far as I know Glassman created Fran as the supposed first CrossFit workout when he was a gymnast in training… I’ve never heard why that particular rep scheme was chosen though. 🤔

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