Cardio doesn't have to be punishment. Two hours on a treadmill, bored and miserable, wondering why nothing is changing — that is not the only option. In fact, it's one of the least effective ones.

Part 03: Burn is your cardio education. Not just what to do — but why it works. Because when you understand the mechanism behind fat-burning cardio, you stop dreading the machine and start using it with intention.

This guide debunks the most common cardio myths, explains heart rate zones in plain English, and breaks down the difference between HIIT and steady-state cardio — when to use each one and why combining both is where the real results happen. Every cardio machine in your gym is covered: treadmill, stairmaster, rowing machine, bike, and elliptical — with beginner settings, HIIT protocols, and form tips for each.

The full 4-week cardio progression plan builds directly on the strength foundation from Part 01: Ignite. It tells you exactly what to do each day, how hard to push, and how to combine cardio with your strength training without burning out.

Also included: how to track fat loss the right way (hint: the scale is the worst tool for the job), and a full motivation reset chapter for the days you don't want to show up.

What's inside

• 6 cardio myths — fully debunked

• Heart rate zones explained — which zone burns fat and when

• HIIT vs. steady-state cardio — side-by-side comparison

• Every gym cardio machine explained with beginner settings and HIIT protocols

• Full 4-week progressive cardio plan

• Strength and cardio combined weekly schedule

• Fat loss tracking guide — 5 methods better than the scale

• Motivation reset chapter — what to do when you want to quit

• 4-week cardio log and journal prompts