⭐21-Week 100km Ultra-Marathon Training Plan for Runners Aged 40+

“Train Smart to 100km: Low Injury Risk, High Confidence”

This 21-week programme is designed specifically for runners aged 40 and over who want to train smart, stay injury-free, and arrive on the start line of their 100km ultra confident, strong, and prepared.

If you've completed at least a marathon or 50km and want a clear, realistic, and sustainable path to 100km – this plan is for you.

This is not a plan that breaks you.
It’s a plan that builds you.
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⭐ Who This Plan Is For

• Runners aged 40+
• Busy people who work full-time
• Anyone wanting a structured, achievable way to reach 100km
• Athletes who’ve completed a marathon or 50km
• Those who prefer time-based, effort-led sessions
• Runners who want confidence on hills and technical terrain

You don’t need speed.
You need consistency. This plan gives you exactly that.
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⭐ What Makes This Plan Different

Most ultra plans ignore the realities of being 40+.
This one doesn’t.

It includes everything a midlife athlete needs to stay strong, resilient, and progressing safely:

✔ Progressive long runs up to 4 hours
✔ Conservative, smart back-to-backs
✔ Downhill conditioning to protect your quads
✔ Strength & mobility sessions built for joint health
✔ Bike endurance to increase aerobic volume without impact
✔ Swim recovery to reduce stiffness
✔ A 3-week cycle (2 build, 1 recovery) to support older athletes
✔ Clear WHAT / HOW / WHY for every session
✔ Fuelling & hydration guidance
✔ Race day strategy, gear checklist & mindset tips
✔ What to do if you miss a session (no panic, no guilt)

This is a complete system — not just a mileage sheet.
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⭐ Weekly Structure (easy to follow around real life)

• Mon – Rest
• Tue – Quality run (intervals/steady/hills)
• Wed – Bike aerobic endurance
• Thu – Easy/steady or downhill technique run
• Fri – Strength + mobility
• Sat – Long run (time-based)
• Sun – Back-to-back or swim recovery

Max weekday session length: 60–90 minutes
Perfect for athletes with careers, family and responsibilities.
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⭐ What You’ll Achieve

By the end of this programme, you will:

💛 Build exceptional aerobic endurance
💛 Strengthen joints, connective tissue and downhill durability
💛 Learn to fuel and hydrate like an ultra runner
💛 Handle long, hilly terrain with confidence
💛 Progress safely without burnout
💛 Arrive on race day fresh, ready and mentally strong

You won’t just survive your 100km — you’ll feel prepared for it.
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⭐ Included Extras

To support you even more, this plan comes with:

📘 Downhill technique cheat sheet
🍌 Fuelling & hydration guide
🎒 Race-day gear checklist
🧠 Ultra mindset tools
🔧 What to do if you miss a session

These resources elevate the plan far beyond a generic TrainingPeaks download.
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⭐ About the Coach

I specialise in coaching athletes aged 40+ with a focus on smart progression, confidence-building, and sustainable training.
My approach prioritises health, longevity and enjoyment, while still achieving big endurance goals.
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⭐ Ready to Run 100km?

If you want a plan that respects where you are in life, protects your body, and gets you to the finish line feeling strong — you’ll love this programme.

Let’s get started.

If you have questions or need support while using this plan, you’re welcome to get in touch.
I love hearing how athletes get on with their first ultra.

📩 Email: jennie@tribirdsportcoaching.com

🌐 Website: www.tribirdsportcoaching.com

📷 Instagram: @tribirdsport.coaching