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Why Calorie Counting Fails—and How TDEE Creates a Precision Fat-Loss Blueprint

Why Calorie Counting Fails—and How TDEE Creates a Precision Fat-Loss BlueprintBy: Dr. Andreas Boettcher Published on: 16/01/2026

Learn what TDEE really is, why calorie counting fails, and how training-day vs fasting-day nutrition creates precision fat loss without hormonal damage.

NutritionFitness
Why Calorie Counting Fails—and How TDEE Creates a Precision Fat-Loss Blueprint

HRV and Testosterone: The Hidden Hormone Signal Men Over 40 Must Track to Reclaim Performance and Vitality

HRV and Testosterone: The Hidden Hormone Signal Men Over 40 Must Track to Reclaim Performance and VitalityBy: Dr. Andreas Boettcher Published on: 15/01/2026

Heart rate variability is the key biomarker men over 40 must track. Discover how HRV predicts testosterone, metabolic health, and performance — without drugs or TRT.

HormonesNutritionFitnessCase Study
HRV and Testosterone: The Hidden Hormone Signal Men Over 40 Must Track to Reclaim Performance and Vitality

Body Fat Calculator

Body Fat CalculatorBy: Dr. Andreas Boettcher Published on: 09/01/2026

Most men obsess over the number on the scale and miss the metric that actually matters: body composition. In this post, we break down why tracking body fat—not just weight—is essential for performance, longevity, and hormone health, and show you how to use the IOH Body Fat Calculator to measure, monitor, and improve your results over time.

Fitness
Body Fat Calculator

Discipline Equals Freedom: Why Motivation Fades and Identity Creates Lasting Change

Discipline Equals Freedom: Why Motivation Fades and Identity Creates Lasting ChangeBy: Dr. Andreas Boettcher Published on: 02/01/2026

Motivation fades, discipline lasts. Discover why discipline equals freedom—and how building a new identity creates lasting health, strength, and success.

Motivation
Discipline Equals Freedom: Why Motivation Fades and Identity Creates Lasting Change

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