How Recreational Runners Can Improve
Through Threshold Training
Threshold training isn’t about talent or grit — it’s about how you allocate it.
Norwegian method or Daniels method? Real blood lactate data shows you which allocation fits your own training.
Does this sound familiar?
You’re running 180+ miles a month and still can’t break 3 hours
Work and family leave you training alone most of the time — hard sessions don’t fit
You always seem to get hurt right before your big race
Runners who correctly allocate intensity and volume can break through this wall.
Adapting to the right load is
the same mechanism for everyone
Two Ways to Build Threshold
Norwegian Method vs. Daniels Method
Lower the intensity and trade for frequency, or hold the intensity and cut the volume down — threshold training sits on a single axis: the trade-off between intensity and sustainable volume. Using real blood lactate data, this book gives you a concrete way to decide which side fits your own mileage, frequency, and schedule.
Trade intensity for frequency
- LGTIT (lactate-guided threshold interval training) / double threshold
- Keep each session’s intensity lower, and run threshold work more often each week
- Suits recreational runners who can log high weekly mileage
Hold intensity, cut the frequency
- Cruise intervals (threshold pace split into intervals)
- Splitting the same intensity into intervals suppresses lactate buildup while extending time at threshold pace
- Suits runners who can’t easily fit in a high training frequency
*The core evidence behind the Daniels-method side comes from a study showing that splitting effort into intervals suppresses lactate buildup. Running-specific validation doesn’t exist yet, and the book is explicit that this is an extrapolation.
Training design built on real measured data
Eight chapters, no guesswork
Preface
What this book covers, and why threshold training is the focus
What Is Double Threshold Training?
The physiology of LT1/LT2, and building threshold as a continuous spectrum
Two Ways to Build Threshold (the center of this book)
Norwegian method vs. Daniels method — the intensity-vs-volume trade-off, and how to decide which fits you
How I Adopted Threshold Training and What Happened
The author’s own double threshold journey, as a real-world example of Chapter 3
What to Consider Before Adopting Threshold Training
What to watch for, and how to keep it up without burning out
Concrete Menus
Weekly schedule examples for both the Norwegian and Daniels methods
How to Use the Lactate Pro 2
A practical guide to measuring your own blood lactate and using it in training
Summary and Future Updates
A recap of the book, plus references and afterword
Bonus charts you can use right away
VDOT Pace Chart (T-Pace Detail)
A quick-reference chart covering T-pace across 9 durations, from 60 minutes down to 20 minutes. Find your own T-pace at a glance.
Heart Rate Zone Chart
Both a 3-zone and a 5-zone version included. Use whichever breakdown you prefer to manage training intensity.
*Bonuses are included with the direct-sale PDF edition only. The Kindle edition is a streamlined, text-only edition.
Questions we often get
Even one or two threshold sessions a week can move the needle. If you can handle high mileage and frequency, lean toward the Norwegian method (high frequency, lower intensity); if frequency is hard to fit in, lean toward the Daniels method (lower frequency, held intensity). The book gives you a concrete way to judge which fits your own situation.
This book is written mainly for recreational runners who can already log roughly 40-55 miles a week. If you’re just starting out, we’d recommend focusing on building a consistent running habit first.
Threshold training is a base-building approach that lets you apply consistent load with a lower injury risk. VO2max training is covered as a complementary element you should combine it with, but detailed VO2max menu design is outside the scope of this book.
If you can handle high mileage and fit in frequent sessions, the Norwegian method is a good fit. If weekdays are busy and frequency is hard to come by, the Daniels method is a better fit. Chapter 3 walks through a concrete way to decide based on your own mileage, frequency, and schedule constraints.
Choose whichever works for you
Direct from this site
Get the full-color PDF edition, plus the bonus charts (VDOT Pace Chart and Heart Rate Zone Chart).
Buy the PDF EditionThreshold training is a design problem.
Understand the intensity-vs-volume trade-off, and the right allocation for you becomes clear. A reproducible training design built from real, first-hand blood lactate data — in one book.