I Was the Muay Thai Coach Encouraging the 6-day Week

Most fighters train their S&C in the wrong order—then wonder why they plateau. I’m Don Heatrick. I’ve spent 25 years coaching world champions using one system: the Optimal Training Cycle. Here’s how it works.

But first, the golden rule most fighters miss: You can’t endure qualities you don’t have. If you want speed endurance but you aren’t fast, you’re just enduring slowness. If you want power endurance but you aren’t powerful, you’re just enduring weakness. You must build the raw quality before you build the endurance of that quality. This is why sequence matters. And it’s why most fighters are stuck.

Here’s what I see constantly. Fighters want to be explosive, so they jump straight to plyometrics and rapid-fire pad work.

They want “strength endurance,” so they do high-rep circuits and metabolic conditioning. It feels logical. Train for what you want. But physiologically, it’s backwards. You can’t convert strength into power if you don’t have strength. You can’t apply power at speed if you haven’t developed power. It’s like putting a roof on a house with no walls.

If your progress has stalled, there’s usually a hidden weak link. I’ve created a free 5-minute assessment that shows you exactly where you stand—and what to fix next. Link’s in the description.

So what’s the right order? We use a system called the Optimal Training Cycle. Instead of mixing everything together, we run two parallel tracks: one for resistance training, one for conditioning. Each targets a specific quality at a time—and both progress through the cycle together. Let me walk you through the four stages.

Before we load the body, it has to move correctly. Most Western fighters have tight hips, stiff shoulders, and poor stability. Add heavy load to dysfunction and you’ll eventualy get injured. Think of it like firing a cannon from a canoe. Big muscles, unstable base—the canoe capsizes. You lose all that force. In this stage, we reset fatigue, clear up niggles, and establish your baseline. If you’re coming off a previous cycle, this is where your body recovers and adapts before we push again. Your resistance training focuses on movement quality. Your conditioning builds the aerobic foundation that powers everything else. We’re turning the canoe into a battleship.

Once you move well, we build your engine. Heavy compound lifts, lower reps. We’re teaching your nervous system to recruit maximum muscle fibers—pure force production. Why strength first? Because strength is the vessel that power fills.

If you can only squat 50kg, your explosive potential is capped. Raise it to 100kg, and you’ve doubled your potential for power. While strength leads your resistance training, power and speed work gets introduced in the background. Your conditioning continues growing your aerobic engine—without killing your strength gains.

Not sure if your training is actually balanced—or if you’ve got a blind spot holding you back?

The free assessment in the description will show you.

Power is strength expressed quickly. We take the force you built in Stage 2 and teach your body to produce it fast—Olympic lifts, weighted jumps, explosive movements. We maintain your strength and progress your speed work, but power leads. Your conditioning evolves too—shifting focus to sustain higher output for longer. This is where fighters start noticing the difference on pads. Strikes feel heavier. Sharper. You’re not pushing—you’re shocking. 

Finally, we peak. Fight-specific speed and sharpness. Unweighted plyometrics, sprints, maximum velocity. Everything you’ve built gets expressed at fight-specific speeds. Your conditioning peaks too—training your ability to produce explosive efforts repeatedly without fading. If you’re competing, this is fight night readiness. If you’re not competing, this is your testing window—where you measure exactly how much you’ve progressed and set up your next cycle. Either way, you’re at your sharpest.

Now here’s what most programs get wrong. They give you a, 8-week plan, or a 12-week plan if you’re lucky. You follow it, you peak… then what? Most fighters either: Regress because there’s no system for what comes next | Repeat the same program until it stops working | Jump to something new and lose their gains. The Optimal Training Cycle solves this. After your first 16-week cycle, you don’t start from scratch. You return to Foundation—but only for one to two weeks. Just enough to reset, recover, and re-test. Then you move through Strength, Power, and Peak again—starting from a higher baseline. Each cycle takes 13–14 weeks. Each one builds on the last. This is how fighters keep improving for years—not months. And if you don’t compete? That Foundation stage becomes your testing window. Your performance tests become your fight—a way to measure progress and calibrate the next cycle.

This isn’t theory. Paul Banasiak used this exact cycle before winning his WBC world title. Liam Harrison came back from a career-threatening shoulder injury using it. It works because it’s built on how the body actually adapts—not on what looks good on Instagram.

Now, I know what you’re thinking. “You mentioned conditioning in each stage—but what exactly should I be doing?”

That’s the piece that trips most fighters up. Just like your resistance training, your conditioning must progress through a specific sequence. Train the wrong energy system at the wrong time, and you kill your power gains. There is a way to build relentless endurance without interference. But first, you need to understand how Muay Thai actually demands energy.

Next week, I’ll show you exactly that—why Muay Thai is not the lactic endurance sport most people think, and why training for the “burn” is destroying your power. If you want to see where you really stand—your strengths, your weak links, and exactly what to focus on—take the free assessment. Five minutes, instant results. Link’s in the description.

And if you want my personal coaching to implement this system, Heavy Hitters is how you get it. It’s built entirely around the Optimal Training Cycle—both tracks, resistance and conditioning, progressing together. It tells you exactly what to do, when to do it, and how to progress—no guesswork, no second-guessing. And you get my coaching to make sure it fits your life. I only open it twice a year, and I only take 20 fighters per intake. Check the link in the description—if it’s open, don’t wait.