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Exercise Physiology

Muscle adaptation, energy systems, fatigue and strength development.

13 articles
19 Best Weighted Vests

19 Best Weighted Vests

Nineteen weighted vests compared from Amazon listings and manufacturer specs, with notes on weight ranges, fit, materials and who each one suits. No hands-on testing.

Fitness Article Hub Editors Nov 2, 2026
17 Best Anatomy Charts

17 Best Anatomy Charts

Our 17 anatomy charts, posters and study guides are compared by listed size, lamination, body systems and format. Overall pick: the Anatomy Lab 5-pack with stretching and pilates charts.

Fitness Article Hub Editors Nov 2, 2026
How Muscle Hypertrophy Works: The Science of Growth

How Muscle Hypertrophy Works: The Science of Growth

Muscle hypertrophy is the process of muscle fiber growth driven by mechanical tension, metabolic stress, and muscle damage, leading to increased protein synthesis and satellite cell activity.

Fitness Article Hub Editors Oct 22, 2026

Welcome to our guide on exercise physiology, the science of how your body responds and adapts to physical activity. This section breaks down the core principles—from the cellular changes that make you stronger to the energy pathways that fuel your workouts—so you can understand the 'why' behind your training. Whether you're a dedicated athlete, a fitness enthusiast, or just starting your journey, grasping these fundamentals helps you train smarter, set realistic goals, and appreciate the remarkable capabilities of your body.

We explore the key areas of muscle adaptation, energy systems, fatigue, and strength development. By learning how your muscles grow and become more efficient, how different activities tap into various fuel sources, and what causes you to tire, you can tailor your approach to cardio, Exercise Science, and recovery for better results.

What you'll find here

  • Clear explanations of how training triggers muscle growth and increased endurance.
  • Breakdowns of the three main energy systems and which activities rely on each.
  • Insights into the different types of fatigue and how to manage them.
  • Science-backed principles for effective strength development over time.
  • Practical applications to connect the theory to your own workout routine.
  • A deeper dive in our article, How Muscles Adapt to Exercise: Energy Systems, Fatigue and Strength.