Stop Picking a Villain
But first, I want to address something. It's so popular right now to just villainize cardio. You hear coaches say, and I've even said it, too, "Cardio is the problem. You don't need more cardio." And there's truth in that, but it's way more nuanced than "cardio is bad."
Just like people dismiss Pilates because of the lighter weights and higher reps. As if something that builds control, stability, and the ability to actually feel the right muscles working isn't doing anything. It's doing something, just not what you think. And it may be more valuable for building strength and power than you even realize.
Every tool in your training has a job. Most people are just using them all for the same job or the wrong job. So instead of picking a villain, let's actually break this down.
The Fat Loss Training Hierarchy
Here's the training hierarchy. I'm giving this to you now so that everything else in this post makes perfect sense.
Number one: Weight training. This is your foundation. This is where most of your focus should be. It's truly non-negotiable.
Number two: Sprint interval training. This is a very specific form of cardio. Short, intense, and used strategically. Not the steady state cardio you've been grinding through.
Number three: Walking. This is also cardio, but again, not the steady state training you've been defaulting to in order to burn more calories. It's not sexy or intense, but this one is more powerful than you even think.
Number four: Pilates and activation work. While this one isn't directly the best maximal strength builder or metabolic booster, it may oddly be the thing that makes every other driver of muscle growth and fat loss more effective.
That's the system. Now, I want to break down exactly what each one of these does, as well as the cost and reward of each. But I also want to be clear: this training hierarchy is specifically for fat loss. If your goal is endurance, performance, or you're coming back from injury, the order shifts, and we're going to cover that, too.
My Mistakes With All Three
Before I go deeper, I want to share something we don't talk about enough. It's the reason coaches like me sometimes push so hard in one direction. And it's also the reason people swing too far the other way.
I overdid cardio. And I don't mean I added a little extra. I mean I genuinely believed that the more I did, the leaner I would get. More sessions, longer duration, harder effort. And at first it worked. The scale did drop. I felt like I was doing everything really right.
But then I felt more exhausted. My workouts got way worse. I was getting softer in places I expected to get leaner and more defined. I was doing more work than ever and getting less of the results I actually wanted.
And that wasn't my only mistake. I made mistakes with all three.
With lifting, I turned my strength workouts into cardio. Lighter weights, faster pace, shorter rest. I thought I was being efficient. I thought the sweat and fatigue meant better results faster because it felt harder. But what I was actually doing was robbing myself of the stimulus that builds muscle. And I honestly had no idea. You can be exhausted after a workout and have done absolutely nothing to build or preserve lean muscle.
Now with Pilates, I actually dismissed it entirely. I was in a "more is more" mindset. I couldn't see the value in something that asked me to be slow and precise. And I slightly scoffed at what I deemed "Barbie weights."
But here's what I missed. If you can't feel your glutes working during a hip hinge, your glutes aren't doing the work. Your lower back is compensating. Your hamstrings are picking up the slack. Pilates taught me to connect. And that connection made everything else work better.
So, what I realized was it wasn't just that I overdid cardio. It's that I literally misused everything.
And that's why you'll see coaches push hard in one direction. We're trying to correct the most common mistake. But people swing too far the other way. From "do more cardio" to "never do cardio." From light weights to "only lift heavy." Both extremes miss the point.
We overcorrect because we're trying to be heard. Nuance doesn't always win online. But nuance is what actually gets you results.
1. Weight Training: Your Foundation
Now, diving into each training component, with weight training being the foundation. Yes, even if your goal is fat loss over more focused muscle building.
Weight training is at the top of the hierarchy for one reason. Muscle is your metabolic engine. You've probably even heard something like that before. More muscle burns more calories at rest. So, you can be the same weight and have more muscle and have a higher metabolic rate. Not to mention look leaner.
Most of us know this. So, I want to go deeper, because most people understand that muscle matters, yet they still don't fully understand why.
First, muscle is metabolically expensive tissue. Your body has to work to maintain it. More muscle means a higher base rate of calorie burn all day, every day, not just during your workouts.
Your Muscles Talk to Your Fat Cells
But that's just the starting point, because in simple terms, your muscles are actually communicating with your fat cells. When muscle tissue contracts during training, it releases signaling proteins called myokines directly into your bloodstream. These are chemical messengers, and they signal your fat cells to start burning.
Your muscles aren't just moving your body. They're sending direct instructions to your fat. That is a completely different way of thinking about what lifting actually does.
Muscle Is Where Your Carbs Go
And the benefits of lifting to build muscle don't stop there. About 80% of the glucose from a meal, the carbs you eat, gets taken up by muscle tissue. More muscle means more places for those carbohydrates to go, which means less stored as fat.
This is the real reason muscle improves insulin sensitivity. Not just that your body handles carbs better. It's that muscle is physically the destination for them. More muscle, more carb capacity, aka less stored and more burned.
The Afterburn
And then there's also the afterburn. An intense strength session keeps your metabolism elevated during the repair and rebuilding process for 24 to 48 hours after you finish. The workout isn't the only calorie burn; the recovery is too. Which means the session you did yesterday is still working for you right now.
That's another reason that if you've been slashing your calories lower on rest days, you shouldn't be. (Let me know in the comments if you want a post on this, too.)
What Happens to Muscle as We Age
And this is why I want every person reading this to understand what actually happens as we age. After 30, women can lose 3 to 8% of muscle mass per decade without resistance training.
That's the actual answer to "I'm eating exactly what I've always eaten, but I'm gaining weight." Your metabolism didn't randomly slow down. As you lost muscle, your metabolic health went with it.
This is why fast weight loss backfires. We've been taught to chase it, too. And the scale rewards you at first, but what the scale can't tell you is whether you're losing fat or muscle or both. And if you're losing both, you're getting lighter and softer at the same time.
The goal of fat loss isn't to weigh less. The goal is to change your body composition. More muscle, less fat. Those are different outcomes. They require different strategies. You can't shrink your way to a strong metabolism. You have to build it.
What Actually Builds Muscle
Now, you may be thinking, "This is great, Cori, but how do I do this with weight training if you've told me I may be making my strength workouts into cardio sessions?"
So, let's talk about what actually builds muscle, because this is where most people are leaving results on the table. They're either demonizing high reps and preaching the "just lift heavy" mantra, or they're avoiding heavy weights, fearing it will make them bulky.
So, I want to touch on what it truly takes to build muscle.
Progressive overload is key. You need to consistently ask more of your body over time. Note, I didn't just say lift heavier.
When it comes to the three drivers of muscle growth, there are:
- Mechanical tension: the actual load on the muscle
- Metabolic stress: the deep burn when a muscle is working
- Muscle tissue damage: the micro tears your body repairs and rebuilds stronger
You need all three. Not just the burn, not just the damage.
And if you've been seeking to be sore, thinking that means you worked hard enough, soreness isn't proof. Soreness is just information. And often it's telling us we're under-recovering or being too random in our training approach.
We also have to recognize the importance of rest so we can truly lift at that 100% intensity and recover, rather than just feeling more tired and getting out of breath. That's what builds muscle.
Not falling into the cardio strength trap that I personally was a victim to and have seen far too many others fall prey to. The rushing through sets, the not resting long enough, the keeping weights light to move faster so you can just feel the burn and feel like you worked harder.
Honestly, that's just using strength training as a cardio tool to see your calorie tracker show you a higher burn in the workout. But this is exactly what causes you to work hard and never truly build muscle to up your daily energy expenditure, even at rest.
This is why people say, "I'm training so hard with weights, but I still look soft." Because they're trying to reveal something they never actually built. You get toned by building muscle and then revealing it. I'm not denying diet is key here.
Now, cardio. The most misused of all the fat loss tools, and the one too often turned to and prioritized for fat loss.
I do just want to say to start, cardio isn't bad. We've gone from overusing it to almost demonizing it. Both are wrong, because cardio not only has a ton of health benefits, but cardio is also a continuum. And the mistake isn't doing cardio. It's doing the wrong kind for your goals.
The Cardio Continuum
Walking. On one end, we have walking. It's low intensity. It's sustainable. It's pretty accessible to everyone. This is not the easy option. It's actually one of the most underrated fat loss tools you have, and I'm going to come back to this one.
Steady state moderate intensity cardio. Then we have steady state cardio. Long duration, moderate intensity, things like running or cycling for 45 minutes plus.
HIIT. In the middle, but more toward the sprint end of the continuum, we have HIIT, which is high intensity interval training. It's harder than steady state, but it's not fully all out. It can be around 80% effort in timed circuits, and intensity will vary up and down.
Sprint interval training and power work. On the other end, we have sprint interval training and power work. Short bursts, maximum output, about 8 to 30 seconds all out. Then you have full rest, usually about 3 to 5 times the work interval.
All of these have value, but they do very different things. And where most people go wrong is camping out in steady state cardio, ignoring both ends of the continuum entirely. Especially as we get older, we often write off sprint work. But honestly, it's even more key.
Your Body Adapts to What You Do Most
We also have to remember that our body adapts to what we do most. So if all you're doing is long, steady state cardio, your body gets better at conserving energy during it. That's actually the adaptation working exactly as it should. It's technically why you can run further and longer over time.
But for fat loss, the same adaptation works against you. This is why people say, "I started with 20 minutes, then 30, then 45, then an hour, and yet I'm not losing weight." At some point, they're doing more work than ever, but seeing less progress.
So that calorie burn we're chasing by adding in more cardio for fat loss is ultimately also what holds us back. And not just because we end up burning fewer calories during our training over time, but also because too much steady state cardio, especially when we're in a calorie deficit, can be catabolic to our muscle mass. This means we can end up losing more muscle in the process, leading to us looking softer instead of more defined.
If you're underfueled, which you technically are in a calorie deficit, and you're increasing that deficit through cardio, an activity not optimized to build muscle, your body will turn to the energy stores it actually has. And that includes muscle. The very thing that makes fat loss sustainable is what your body starts to break down to compensate.
This doesn't mean never do steady state cardio. It means don't make it your primary fat loss tool.
Because what I want you to realize is it isn't about ditching cardio. It's about choosing the kind that actually supports what you're building with your strength training instead of fighting against it.
And that's why sprinting and walking are the second and third levels in the training hierarchy. Together, they create the perfect balance: intensity and recovery. They create the metabolic and hormonal environment that makes your lifting actually work, without competing with it for recovery.
2. Sprint Interval Training
So, let's start with sprinting, because when people hear "sprint," they immediately think, "I know I can't do that."
Sprinting means maximal effort for a short burst. That's it. You can sprint on a bike, on a rower, with kettlebell swings, with sled pushes, or even with battle ropes. A sprint doesn't mean high impact. Sprints can be done with any movement that lets you go all out safely, because meeting ourselves where we are is key.
With sprints, if you can sustain your effort for more than 30 seconds, it's not a true sprint. True sprint intervals are 8 to 30 seconds all out, with enough rest to actually repeat the effort at a true 100% intensity.
Skip the rest and you've changed the entire stimulus. You're no longer training speed or power. You just slid down the cardio continuum and lost the adaptation you were training for.
Why Sprints Are So Important for Fat Loss
Insulin sensitivity and metabolic flexibility. Sprints improve insulin sensitivity, meaning your body gets better at using carbohydrates for fuel instead of storing them as fat. But it really goes beyond that. Sprint training actually improves your metabolic flexibility: your body's ability to switch between burning carbs and burning fat depending on what's available. Most people are metabolically rigid. They rely heavily on one fuel source and struggle to access stored fat efficiently. Sprints fix that.
Visceral fat. They also specifically target visceral fat, the fat that sits around your organs, which is both the most dangerous for your health and some of the hardest to shift with steady state cardio alone.
Growth hormone. And here's the one that matters most, especially as we get older. Sprints trigger a significant spike in growth hormone. Growth hormone directly supports fat burning and muscle preservation. And this becomes especially critical as we age, because growth hormone levels naturally decline through perimenopause and menopause. Sprint training is one of the most powerful ways to counteract that decline and keep your hormonal environment working for you instead of against you.
Muscle. Sprints also preserve and can even build muscle, which I'm going to continue to preach as the foundation for everything.
Better lifting. And last but not least, sprints actually help support the top of our training hierarchy so we get even more out of our lifting. Sprints and power work improve your neural drive, the communication between your nervous system and your muscles. That carries directly into your lifting, because better neural drive means better muscle recruitment, which means you get more out of every single strength session to see better muscle gains. Sprints don't just complement your lifting. They make your lifting work better.
And all this happens in under 10 minutes. All you need is 5 to 8 rounds, one to two times a week. Intensity replaces volume. You don't need to do more. Honestly, you shouldn't do more.
3. Walking
Now, the other end of the cardio continuum: walking. Yep, boring, basic walking.
I know what you're thinking. "That's it? That's the advice?" But hear me out, because walking does things for fat loss that no other tool on this list does.
The Fat Burning Zone
Let's start with the fat burning zone. You've probably heard this term thrown around, and it sounds like marketing, but it's actually real.
The fat burning zone is roughly 60 to 70% of your max heart rate. It's a low enough intensity that your body preferentially uses fat as its primary fuel source, not carbs. Walking hits that zone naturally.
That doesn't mean it's magic, and it doesn't mean you're torching a ton of calories. But what it does mean is that walking is literally training your body to access and burn stored fat more efficiently, which ties directly back to the metabolic flexibility we talked about with sprints.
Sprints train your body to switch fuel sources rapidly. Walking trains your body to burn fat at rest. Together, they're building a body that is better at using fat for fuel around the clock.
Cortisol
And then there's cortisol. Now, before you start demonizing cortisol, you actually need this hormone. Cortisol gets you out of bed in the morning. It mobilizes energy when you need it. It's part of what makes your sprint sessions effective.
But chronically elevated cortisol, the kind that comes from too much training stress, too little recovery, and too little sleep, is where the problem starts. Because high cortisol over time directly drives fat storage, especially visceral fat. Yep, that stubborn fat around your middle.
And this is why more isn't always better. You can be training hard, eating well, doing everything right, and chronically elevated cortisol will work against every single one of those efforts. Walking is one of the most effective tools we have for bringing cortisol levels back down to baseline.
And here's where it gets really interesting in the context of the whole system we're creating with these training tools. After a sprint session, your cortisol spikes. That's your body responding exactly the way it should. But cortisol needs to come down for your body to actually reap the benefits. Walking accelerates that process.
So sprints create the stimulus. Walking creates the recovery environment that lets the stimulus turn into actual results. They aren't just both good tools. They're specifically designed to work together.
Walk After Meals
And here's how to get even more bang for your buck from walking. Aim for a 10 to 15 minute walk after a meal. This can reduce your blood sugar spike by up to 30%. Not a run, not a workout, just a walk around the block after you eat.
That means your body is shuttling more of those carbohydrates into muscle glycogen, stored as usable energy in your muscles, rather than converting them to fat.
And the more muscle you have, the more places those carbs have to go, which is exactly why lifting stays at the top of the hierarchy. More muscle means more capacity. More capacity means more carbs stored as fuel and less converted to fat.
So walk after meals. Small effort, big payoff.
NEAT
And then there's NEAT, which is non-exercise activity thermogenesis. This is just a fancy way of saying the calories you burn outside of structured exercise.
Research suggests that NEAT can vary by up to 2,000 calories per day between people of similar size. 2,000 calories. That gap isn't explained by workouts. It's explained by how much people move throughout their day. And walking is one of the most powerful levers you can pull to increase it.
And it does all of this without adding meaningful stress to your body.
So, if you've thought to yourself, "I just need to work out more," don't. We have to recognize that exercise is a stressor. A good one, but still a stressor. And there's a point of diminishing returns. More sprints won't fix what a walk could.
So aim for 7,000 to 10,000 steps a day. But don't get hung up on the number. Move more. Morning walks, post-meal walks, rest day walks, all of it counts. Sometimes the most productive thing you can do is just go outside and walk.
4. Pilates and Activation Work
Now, Pilates. Pilates is touted as making your muscles look long and lean, and as helping you get that toned look. But technically, our muscles don't tone. And the idea that Pilates elongates muscles is not physiologically accurate. Muscle shape is determined by genetics and insertion points. No exercise changes that.
So, if those are the reasons you're doing Pilates, or the reasons you're dismissing it, both are based on the wrong thing.
What Pilates Actually Does
Here's what Pilates actually does. It builds something that weight training often neglects: the ability to feel the right muscles working. And that right there is its superpower.
Think about it this way. You can load a deadlift with serious weight, but if all you feel is your lower back, your glutes and hamstrings aren't getting the stimulus they should. You're not building the muscle you think you are.
And progressive overload on top of a compensation pattern doesn't build more muscle. It just reinforces the wrong movement. So more weight training on an improper recruitment pattern sabotages your results.
Because remember, muscle is your metabolic engine. If you can't recruit the correct muscles properly, you can't effectively build them. And if you can't effectively build muscle, your fat loss results stall.
This is where Pilates becomes key. It teaches you to slow down and connect. To find breath and movement together, to feel your core brace before you move, to feel your glutes before your hip extends, to understand what stability actually feels like. And that transfers directly into your lifting. Better recruitment, better stimulus, better results.
Don't Dismiss the Lighter Weights
Now, I also want to push back on Pilates being dismissed because of lighter weights and higher reps. Yes, Pilates uses lighter loads, sometimes even just body weight. But the control, the range of motion, the time under tension, even the demand for stability, that's training your nervous system. That's building the mind-body connection. That's addressing the imbalances that heavier loading will only reinforce.
And those imbalances, left unaddressed, become the thing that sidelines you and can completely derail your progress. An injury doesn't just hurt. It sets your timeline back weeks and sometimes even months. Every session you miss is muscle stimulus lost. Every week you're sidelined is muscle your body isn't building, or even worse, is starting to lose.
Pilates is prehab. And prehab is what protects the work you're doing every single time you step into the gym. It may not be the primary driver of your results, but it protects and supports the rest of the hierarchy.
So, let's think of it this way. An engine that stays running well will always outperform one that keeps breaking down.
What This Looks Like Week to Week
So now that you understand why each of these earns its place, here's what this actually looks like week to week.
- Strength training: At the foundation, strength train 3 to 4 times a week.
- Sprint interval training: Layer on sprint interval training about 1 to 2 times a week, after your strength workouts or on an off day.
- Walking: Add in walking daily if possible. Shoot for those 7,000 to 10,000 steps.
- Pilates or activation work: Finally, include Pilates or activation work. Add moves into your warm-up routine or on mobility and recovery days.
That's your system. Tweak it to fit your schedule.
How the Hierarchy Shifts When Your Goals Change
Let's talk about how this hierarchy shifts when your goals change, because this is where "just lift heavy" or "just do cardio" advice breaks down.
If your goal is performance for an endurance sport: Cardio specificity matters more. If you're a runner, you need to run. Strength training still matters. It builds power, reduces injury risk, and extends your longevity. But the order does adjust.
If your goal is longevity or avoiding injury: All three pillars need to be represented. Balance, stability, and control become more important with age, so Pilates earns a higher spot. Cardio diversity, both low intensity and high intensity, becomes critical for long-term heart health.
If your goal is building muscle: Lifting stays your main focus, but cardio volume goes down. You're protecting recovery above everything else.
The hierarchy doesn't change what matters. It changes what matters most right now, for your goal, in this season.
The Bottom Line
So, if you feel like you've been working hard and not seeing the results you deserve, assess whether you're prioritizing the right methods. Stop asking what's best and start asking, "Am I using each of these in the right role?"
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