Skip to main content

Intro: RB100 isn’t just about reps — it’s about consistency. The 100 Days of Fitness Challenge is a cornerstone of this platform. The rules are simple: move your body every day for 100 consecutive days.

No max lifts required. No gym memberships. Just consistent action, done daily, and logged. The power of the streak is real.


How It Works

  • Duration: 100 days, no skips
  • Daily requirement: At least 20 minutes of intentional movement
  • Format: Anything counts — walking, lifting, swimming, yoga, sport, stretching
  • Tracking: Use our printable or digital RB100 Tracker to stay accountable

What Counts?

  • A 30-minute weights session? ✅
  • 45-minute walk with the dog? ✅
  • 20-minute yoga flow before bed? ✅
  • Intense sport or mobility? ✅

If it’s movement, it counts.


Why It Works

  • Builds momentum through daily discipline
  • Reinforces identity change (“I’m someone who trains daily”)
  • Generates measurable progress over time
  • Supports mental clarity and energy

Tips for Success

  • Lay out clothes the night before
  • Schedule your movement like a meeting
  • Find an accountability partner or log on socials with #RB100Challenge
  • Use variety: weights, walking, bodyweight, mobility, sport

Download the Tracker

Download the RB100 Challenge Tracker PDF
Track it with the Google Sheets version

Use it on your phone, print it, or screenshot and cross it off daily.


Pair it with:


External Resources:

Editorial Team

The Relentless Bravery Editorial Team brings together athletes, coaches, and experts to share trusted insights on training, recovery, and mindset. Always consult a professional before making fitness or health changes.

Athlete holding a forearm plank on gym mat, sweat forming, timer in view — overlay text- 100-Second Plank Challenge
100-Second Plank: Can You Hold It?ArticlesStrength & Conditioning

100-Second Plank: Can You Hold It?

Test your core, posture, and patience with this deceptively simple challenge: a 100-Second Plank hold. Find out how to do…
Richard BransonRichard BransonDecember 27, 20242 min
A freestyle skier sitting at the base of a snowy mountain at sunset, helmet off, breathing deeply after training
The Quiet Strength of Recovery: Why Rest is the Hidden EdgeArticlesHabits, Tech & Mindset

The Quiet Strength of Recovery: Why Rest is the Hidden Edge

Former Olympian Kevin Harbut explores why elite performers treat rest not as a break but as training. Discover how recovery…
Kevin HarbutKevin HarbutOctober 21, 20253 min
A determined athlete mid-race at a HYROX event pushing through the final wall balls under bright competition lights, crowd cheering, sweat flying, expression showing focus and fatigue
How to Train for Your First HYROX (Even If You’ve Never Competed Before)ArticlesHYROX TrainingStrength & Conditioning

How to Train for Your First HYROX (Even If You’ve Never Competed Before)

HYROX is a test of strength, endurance, and mental toughness but it’s also completely achievable with the right plan. Here’s…
Richard BransonRichard BransonOctober 8, 20254 min