Know what is changing
Four InBody scans help separate fat loss from changes in total weight, muscle, and hydration.
September 21 – November 22
Burn fat. Keep the habits.
Nine focused weeks to improve your body composition, learn how to eat with more confidence, and build a routine you can carry through the holidays and beyond.
Open to CapFit members, CrossFit 337 members, and nonmembers.
9 weeksOne practical focus each week
4 scansTrack fat loss and muscle retention
$600Free-year prize value per qualifying division
Sep 21The challenge officially begins
Why this challenge
This is about losing fat—not chasing a smaller number on the scale.
Your score rewards fat loss and body-fat reduction while discouraging excessive muscle loss. The goal is progress you can see, measure, and maintain.
Learn one thing at a time
Nine short nutrition lessons turn information into one realistic habit you can practice each week.
Stay accountable
Scheduled scans, a private challenge group, and an optional initials-only leaderboard keep your progress visible.
Everything included
More than a weigh-in contest.
You get the education, measurements, access, and structure needed to make the nine weeks count.
Four InBody scans
A starting scan, two progress scans, and a final scan—all included.
Nine nutrition lessons
Short, practical guidance on protein, balanced meals, hydration, weekends, recovery, and more.
One weekly habit
No crash diet. Each week gives you one action to practice and carry forward.
Private challenge group
Your Start Here guide, official rules, weekly lessons, and resources stay together in the CapFit app.
Open Gym access for nonmembers
Nonmember registration includes CapFit Open Gym and Kisi door access through November 25.
Prize eligibility
Eligible male and female division winners can each earn a free year of CapFit membership.
Important dates
Your challenge roadmap.
Progress scans help you adjust along the way. Only the starting and final scans determine prize scoring.
1
September 14–27
Starting InBody scanEstablish your official baseline. Complete this by September 27 to remain prize eligible.
2
September 21
Challenge beginsYour first lesson and weekly action step get the nine-week challenge underway.
3
October 12–18
Progress scan 1Check the trend and see how your first few weeks are working.
4
November 2–8
Progress scan 2Review your progress and adjust one habit for the final stretch.
5
November 23–25
Final InBody scanComplete the challenge and determine the official final standings.
Scoring and prizes
Reward fat loss. Protect muscle.
Male and female divisions are scored separately using the same body-composition formula.
How your final score works
Fat pounds lost + (body-fat percentage points lost × 3) − muscle-loss penalty
The first 2.0 pounds of skeletal muscle loss receive no penalty. After that, one point is subtracted for every additional pound lost, including tenths.
- Muscle gain does not add bonus points.
- Fat or body-fat increases add zero points.
- Ties are broken by body-fat reduction, then fat pounds lost, then muscle retained.
The prize
$600 One year of CapFitEach qualifying division winner receives 12 consecutive months of CapFit Single membership. Existing CrossFit 337 winners receive twelve $50 monthly membership credits.
Important: Each division must have at least 10 paid, prize-eligible entrants. One division may qualify even if the other does not.
Choose your registration
Ready to start?
Use the option that matches your current membership status.
$60
Member early-bird registration through September 20. The member price becomes $75 beginning September 21.
- Four InBody scans
- Nine weekly lessons and habits
- Challenge group and resources
- Prize eligibility when requirements are met
You can also register at the CapFit front desk or message us in the CapFit app.
$75
Your challenge registration also functions as a CapFit Open Gym membership for the challenge period.
- Everything included in the challenge
- Unlimited CapFit Open Gym access
- Kisi entrance-door access
- Access through November 25
CrossFit 337 classes and an ongoing membership after November 25 are not included.
Questions
What to know before you join.
Do I need to be a CapFit member?
No. The challenge is open to everyone. The nonmember package includes CapFit Open Gym and Kisi access from September 21—or immediately after a later purchase—through November 25.
Does the nonmember package include CrossFit 337 classes?
No. It includes CapFit Open Gym only. CrossFit 337 classes require a separate CrossFit membership or eligible pass.
What happens if I join after September 27?
You can still join, use the remaining access, complete the scans, and receive all nine lessons. However, you cannot qualify for the free-year prize without a valid starting scan completed by September 27.
Do I have to share my weight or scan results?
No. Individual results remain private. Leaderboard participation is optional, and any published standings use initials only.
Is this a personalized diet plan?
No. The challenge provides general nutrition education and practical habits, not medical care or individualized nutrition advice.
Where do the lessons and rules live?
After registration, you are added to the Fall Fat Burn Challenge 2026 group in the CapFit app. The Start Here guide and official rules are available immediately, and a new lesson releases each Monday.
Nine weeks. One commitment.
Start before the holidays instead of waiting for January.
Complete your starting scan by September 27, focus on one repeatable habit each week, and give yourself the structure to make real progress.