Pelvic Prime's Anatomy Academy Series: Weight Management

Metabolism

Metabolism is the process by which your body converts food into energy. For anyone looking to manage their weight, understanding how metabolism works is the first step. It is influenced by multiple factors, including age, hormones, muscle mass, and lifestyle habits.  Insulin plays a critical role in regulating metabolism by controlling how your body stores and utilizes energy. Understanding how these systems interact can help you optimize your metabolic health and improve weight management outcomes.

Metabolism: The Engine of Life

How Your Body Uses Energy

Metabolism is everything your body does to keep you alive and functioning. It’s how your body creates, uses, and stores energy from food. This ongoing process is called homeostasis—keeping your body in balance.


Where Does Energy Come From?

Food is fuel: Your body gets energy from food, measured in kilojoules (kJ) or calories.

Energy balance matters:
Illustration comparing a thermostat to metabolism in maintaining homeostasis, demonstrating the body's regulation of temperature and energy balance.

Homeostasis: Just like your body regulates temperature, a thermostat keeps a room at a set temperature by turning the heater or air conditioner on and off.

Illustration of catabolism showing how the body breaks down carbohydrates, proteins, and fats to release energy for muscles, brain, and organs.

Similar to how a fire burns wood for heat, your body converts food into usable energy.

Two Sides of Metabolism: Catabolism & Anabolism

Metabolism has two key jobs that keep you strong, healthy, and energized:


Catabolism: Breaking Down for Energy

Your body breaks down food (carbs, proteins, fats) into smaller building blocks. This releases energy to power your muscles, brain, and organs.

Anabolism: Building & Repairing

Your body uses energy to build muscle, repair tissues, and support growth. This is how your body heals injuries, builds muscle after exercise, and keeps your cells healthy. Any extra nutrients not used for building get stored as fat for later use.

your body uses nutrients as raw materials and energy to repair, grow, and strengthen. Just as bricks, wood, and cement create a sturdy structure, proteins, fats, and carbohydrates support muscle growth, healing, and cell renewal.

Like constructing a building, your body uses nutrients and energy to repair, grow, and maintain structure. 

🔎 Check Your Knowledge!

Which of the following best describes the difference between catabolism and anabolism?

A) Catabolism builds muscle, while anabolism breaks it down.
B) Catabolism releases energy by breaking down food, while anabolism uses energy to build and repair the body.
C) Catabolism and anabolism both store excess nutrients as fat.
D) Anabolism and catabolism are two names for the same process.

B) Catabolism releases energy by breaking down food, while anabolism uses energy to build and repair the body.


A simple way to remember it:
Catabolism = Breaking down for energy 🔥
Anabolism = Building up & repairing 🏗️

🔓 Unlock Full Access to the Handout Library

You’ve seen a sample — now gain access to the complete collection of my professionally designed handouts covering:

Whether you're a past patient, a DIY learner, or just curious — these resources were made to empower you with real, actionable strategies.


What’s Included:


Note: This resource is for educational purposes and is not a substitute for medical care. It does not include personalized consultations or direct support.


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