Four Pillar Fitness Insights Banner featuring a 2D illustration of Strength Coach  Stephan Earl
Four Pillar Fitness Insights Banner featuring a 2D illustration of Strength Coach  Stephan Earl

4P Fitness Insights

Explore practical, science-backed insights on strength, mobility, nutrition, recovery, longevity, and today’s biggest fitness trends. Use the category filters or search bar below to quickly find the guidance, answers, and topics that matter most to you.

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Women's Health, Nutrition, Recovery Stephan Earl Women's Health, Nutrition, Recovery Stephan Earl

Insulin and Cortisol vs. Fat Loss: Why Your Hormones May Be Working Against You

Learn how insulin resistance, cortisol, stress, sleep, nutrition, and training can affect fat loss. This Four Pillar Fitness Insights article explains why stubborn weight loss is not always about willpower and how strength, smarter food choices, better recovery, and healthier habits can support metabolism and body composition.

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Women's Health, Strength, Longevity, Recovery Stephan Earl Women's Health, Strength, Longevity, Recovery Stephan Earl

Strong After 40: Why Women Need Muscle, Hormone Support, and a Smarter Fitness Plan

Discover why women need strength training, muscle, hormone support, recovery, and smart nutrition after 40. This Four Pillar Fitness Insights article explains how aging, menopause, stress, and low muscle mass can affect metabolism and body composition, and why a balanced fitness plan helps women build strength and long-term health.

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Strength, Nutrition, Longevity, Trends and Myths Stephan Earl Strength, Nutrition, Longevity, Trends and Myths Stephan Earl

The GLP-1 Muscle Crisis: How to Preserve Lean Mass While Losing Weight

GLP-1 medications can support weight loss, but losing muscle is a real concern. This Four Pillar Fitness Insights article explains how to protect lean mass with strength training, protein, nutrition, recovery, and better habits so weight loss supports long-term health, metabolism, and body composition instead of weakening the body.

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Longevity Stephan Earl Longevity Stephan Earl

The Three Stages of Fitness: Build, Maintain, Defend

Learn the three stages of fitness: Build, Maintain, and Defend. This practical guide explains how strength training, mobility, nutrition, and recovery should change across different seasons of life so you can build muscle, protect progress, and stay strong, capable, and independent as you age.

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Longevity, Recovery, Trends and Myths Stephan Earl Longevity, Recovery, Trends and Myths Stephan Earl

The Longevity Blueprint: Peptides for the "Over 40" Athlete

Peptides are trending in fitness, recovery, and longevity, especially for active adults over 40. This Four Pillar Fitness Insights article explains what peptides are, why people are interested in them, and why strength training, nutrition, recovery, medical guidance, and realistic expectations still matter most for aging well.

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Longevity, Training, Trends and Myths Stephan Earl Longevity, Training, Trends and Myths Stephan Earl

The Shaky Truth: Can Vibration Plates Really Replace Your Workout?

Vibration plates are popular in fitness, wellness, and social media, but can they really replace strength training? This Four Pillar Fitness Insights article looks at the claims, possible benefits, limits, and myths around vibration training, helping you understand where it may fit and where real movement still wins.

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Training, Trends and Myths, Strength Stephan Earl Training, Trends and Myths, Strength Stephan Earl

The Rise of HYROX and the Hybrid Athlete: Real Science or Just Another Fad?

HYROX and hybrid training are changing how people think about strength, endurance, and performance. This Four Pillar Fitness Insights article explores why this training style is popular, what the science supports, where the risks are, and how everyday athletes can build strength, conditioning, recovery, and long-term fitness.

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