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The Scientist’s Notebook
Research-backed training insights for endurance athletes.

What readers say

Stopped using FTP alone after reading the lactate thresholds article. Ursula (33), Switzerland
The CP/W′ calculator matched my field test within ~5 W. Javier (42), Spain
The only place I’ve seen practical protocols without influencer noise. Max (25), Germany

Join the community of evidence-based athletes.

Latest

05
Jun
Snippet #021: Sodium drives fluid retention to restore plasma volume

Snippet #021: Sodium drives fluid retention to restore plasma volume

Core Insight When athletes rehydrate after prolonged exertion, replacing water alone is often inefficient for stabilizing internal fluid compartments. The
2 min read
01
Jun
Entry #023: Concurrent Strength Training Architecture for Endurance Performance

Entry #023: Concurrent Strength Training Architecture for Endurance Performance

For decades, a persistent tension has existed in endurance coaching: the conflict between the necessity of high-volume aerobic training and
8 min read
29
May
Snippet #020: Decoupling Duration from Intensity at Functional Threshold Power

Snippet #020: Decoupling Duration from Intensity at Functional Threshold Power

Core Insight While Functional Threshold Power (FTP) is theoretically defined as the highest power sustainable for one hour, physiological data
1 min read
25
May
Entry #022: Nutritional Architecture for Body Composition Optimization

Entry #022: Nutritional Architecture for Body Composition Optimization

The goal of improving your power-to-weight ratio creates a natural conflict in your training. You are trying to eat less
7 min read
22
May
Snippet #019: Durability Requires a Distinct Physiological Stimulus from Threshold Power

Snippet #019: Durability Requires a Distinct Physiological Stimulus from Threshold Power

Recent physiological analysis suggests that Functional Threshold Power (FTP) and durability are independent performance dimensions requiring different training stimuli to
1 min read
18
May
Entry #021: Satiety Mechanics and Fiber Architecture in Endurance Nutrition

Entry #021: Satiety Mechanics and Fiber Architecture in Endurance Nutrition

The endurance athlete exists in a state of metabolic tension: the requirement for high energy flux to support training load
7 min read
15
May
Snippet #018: Fiber Increases Gastric Volume to Optimize Body Composition

Snippet #018: Fiber Increases Gastric Volume to Optimize Body Composition

The Mechanism Severe energy deficits increase fatigue and physiological stress, often negating the theoretical benefits of improved power-to-weight ratios. Dietary
2 min read
11
May
Entry #020: Methodological Variance in Lactate Threshold Determination

Entry #020: Methodological Variance in Lactate Threshold Determination

Insane. What a journey so far already. 20 Entries and so much community engagement! It has been an absolute pleasure
9 min read
08
May
Snippet #017: Polygenic Scoring Identifies General Endurance Predisposition

Snippet #017: Polygenic Scoring Identifies General Endurance Predisposition

The Mechanism Genetic Endurance Prediction Scores (GES) aggregate the weighted influence of multiple single nucleotide polymorphisms (SNPs) to estimate athletic
2 min read
04
May
Entry #019: The influence of humidity on sports performance

Entry #019: The influence of humidity on sports performance

Scope and Context This overview is for endurance coaches and athletes preparing for performance in hot, humid environments. It specifically
7 min read