Vo2 Max, CP and Lactate threshold Calculators added to The Scientist`s Notebook

We`ve added three field tools that turn hard efforts into usable constraints, not vague zones.

Critical Power and Pacing

Critical Power and Pacing

Every Monday, one deep dive distilled from the latest research into actionable speed.

The Scientist’s NotebookThomas Mortelmans

The first set applies the critical power model to two or three maximal tests and returns CP, W’, and pacing estimates within their valid time window.
No black boxes here. The outputs rise or fall directly with how evenly you pace those efforts.

Vo2 Max Calculator

Vo2 Max Calculator

Every Monday, one deep dive distilled from the latest research into actionable speed.

The Scientist’s NotebookThomas Mortelmans

The second tool estimates VO₂max from a single 5 minute all out test, using the Sitko et al. equation derived from lab validated data.
It is a field estimate, not a lab proxy, and it behaves exactly like one.
Clean pacing and repeatability matter more than chasing a big number.

Lactate Threshold Calculator

Lactate Threshold Calculator

Every Monday, one deep dive distilled from the latest research into actionable speed.

The Scientist’s NotebookThomas Mortelmans

This calculator is designed to analyse blood lactate data from incremental cycling, swimming our running tests. Its accuracy depends entirely on how the test is executed and how the samples are taken.

The calculator computes multiple threshold definitions in parallel (OBLA, Baseline + Δ, Dmax variants, log-log breakpoints).

All three calculators are now live in The Scientist’s Notebook.

Have fun!

Cheers,

Dr. Thomas Mortelmans

If you want to see what I read to keep my own work sharp outside this newsletter, this is the list.

My reference shelf

A deliberately mixed set of newsletters, chosen for signal quality. Different domains, one standard.

The Scientist’s NotebookThomas Mortelmans

We build our training plans using these tools routinely and they are built on a simple truth: Adaptation only happens when you apply the right stress, at the right time, in the right dose. 

ESQ.Coaching - Training Plans

The Endurance Science Quest (ESQ) - Philosophy Most athletes don’t plateau because of a lack of effort; they plateau because they lack direction. Training isn’t a test of your willpower (or spikes in motivation); it’s a physiological lever we pull to get a specific result. And one that

The Scientist’s NotebookThomas Mortelmans

1 Referal = 1 Reward Campaign

Invite one friend who joins the newsletter and unlock a free 12-week Gran Fondo training plan, plus three endurance playbooks.

What you get:

• A structured 12-week build focused on long climbs, fatigue resistance, and race pacing:
• Three playbooks covering fueling, intensity control, and training decisions
• Access after your first successful referral

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