From the Desk of Carolyn Dean MD ND
Why Sustainable Cardio Starts at the Cellular Level
Summer has a way of inspiring fresh starts. Walking trails are busier, bicycles come out of storage, neighbourhoods fill with runners again, and many of us decide it’s finally time to become more active.
This year, the fitness conversation has shifted in an encouraging direction. Instead of glorifying punishing workouts and the “no pain, no gain” mentality, more people are embracing sustainable movement. Zone 2 training—comfortable, conversational-paced exercise—has become mainstream, and the Japanese walking method, with its alternating intervals of brisk and easy walking, has become one of this summer’s most talked-about fitness trends.
I think that shift makes healthy exercise more achievable for more people.
For years, too many people believed that better health required pushing harder, exercising longer, and ignoring the body’s signals. Today, we’re beginning to appreciate that consistency often produces better long-term results than intensity alone. Intensity can make you crash and give up, whereas consistent exercise is soothing and doable.
But before you lace up your shoes or begin a new walking or running routine, I’d like to suggest something that rarely appears in fitness articles.
Before beginning any new exercise routine, it’s important to remember that heart health minerals provide the cellular foundation that allows your cardiovascular system to perform, recover, and adapt to movement.
Your cardiovascular system needs more than strong muscles and healthy lungs.
It needs the minerals that allow every heartbeat, every blood vessel, and every muscle cell to work together efficiently.
Let’s compare it to a car. You can buy the best tires available, but without clean oil circulating through the engine, the journey won’t last very long. Exercise improves your cardiovascular fitness, but minerals are part of the foundation that keeps the entire system running smoothly.
The Cardio Comeback Is About Training Smarter
One of the healthiest developments in today’s fitness culture is the growing recognition that recovery matters just as much as exercise itself.
In fact, Researchers, coaches, and physicians are talking more openly about overtraining—not just among elite athletes, but among everyday people who push themselves too hard while sleeping too little, eating on the run, and living under chronic stress.
Instead of asking, “How much can I do?” more people are asking, “What can I sustain?”
That’s why Zone 2 training has become so popular. Working at an intensity where you can still carry on a conversation builds cardiovascular fitness without placing excessive strain on the body. Likewise, the Japanese walking method has attracted attention because it combines periods of brisk walking with easier recovery intervals, making it approachable for people of many fitness levels.
These are positive trends because they encourage movement that people can maintain for years instead of days or weeks.
What I find interesting, however, is that while these conversations focus on heart rate zones, recovery metrics, and training plans, they don’t mention the nutritional foundation that allows the cardiovascular system to adapt to exercise in the first place.
As a result, Movement challenges the body. Minerals are essential so the body can respond to that challenge.
Heart Health Minerals: What Your Heart Needs to Perform
We often think of the heart as simply a muscle, but it’s also an extraordinary electrical organ. Every heartbeat depends on an intricate balance of minerals moving in and out of cells at precisely the right time.
Magnesium
One of magnesium’s important jobs is helping regulate the movement of calcium into cells. Calcium tells muscles—including the heart muscle—to contract. Magnesium provides the balance by helping muscles relax afterward. In blood vessels, that balance allows the smooth muscle surrounding the arteries to relax rather than remain overly constricted, supporting healthy blood flow during physical activity.
Magnesium also supports the electrical system that coordinates each heartbeat. Along with potassium, it helps maintain the normal electrical activity heart cells rely on to function efficiently.
That’s why I often describe magnesium as one of the body’s master minerals. It supports a healthy, steady heart rhythm while helping blood vessels relax appropriately during exercise.
Potassium
An equally important mineral, although it tends to receive less attention outside discussions of muscle cramps.
Every heart cell depends on potassium to maintain its electrical charge. During exercise, potassium shifts in and out of cells as muscles contract and recover. Summer workouts add another challenge because potassium is also lost through sweat. On a hot day, vigorous exercise can produce one or even two litres of sweat, taking meaningful amounts of potassium along with it, putting stress on cardiac rhythm and potentially contributing to cramping.
Maintaining healthy potassium levels helps support the electrolyte balance your heart and muscles depend on during physical activity.
Vitamin C
Likewise, Vitamin C brings another dimension to cardiovascular health that many people overlook.
Most people associate vitamin C with immune health, but it also plays a critical role in collagen production. Collagen gives blood vessel walls their structure and strength. Every time your heart pumps, your arteries expand and recoil thousands of times each day. Healthy collagen helps those vessels remain resilient over decades of use.
This is one of the reasons I’ve become so excited about my upcoming work on vitamin C. It has functions throughout the body that deserve far more attention than they currently receive.
Selenium
This mineral also completes another important part of the picture.
Exercise naturally increases the production of free radicals as muscles work harder and oxygen consumption rises. That’s completely normal. Selenium supports the body’s antioxidant enzyme systems, including glutathione peroxidase, which help neutralize those oxidative byproducts generated during exercise.
Rather than working independently, these nutrients form a team.
Each contributes something different, yet together they support the remarkable work your cardiovascular system performs every second of every day.
Healthy Arteries Need More Than Good Blood Flow
When we think about cardiovascular fitness, we often picture the heart itself. But the heart can only pump blood through the “highways” that are available to it.
Your arteries are those roads. Like any well-built highway, they have specific requirements:
They need to be flexible enough to handle changing traffic
They need to be structurally sound enough to last.
Magnesium contributes to flexibility by supporting the natural relaxation of blood vessels during increased physical demand.
Vitamin C contributes to strength by supporting the collagen that gives vessel walls their structural integrity.
I like thinking about these nutrients as partners.
Flexibility without strength isn’t enough.
Strength without flexibility isn’t enough either.
Healthy cardiovascular function depends on both.
Why Cardio Without Mineral Support Can Backfire
Exercise is one of the best investments you can make in your long-term health. Mainstream and alternative medicine and ever health blogger on the planet is now touting exercise.
At the same time, every workout asks something of your body. During summer exercise, sweating is part of staying cool. But your sweat doesn’t contain only water.
It also carries away sodium, potassium, magnesium, and other electrolytes that the body must continually replace.
For example, If you’ve ever finished a long walk or bike ride feeling unusually fatigued, noticed your muscles beginning to cramp, or felt that your heartbeat simply felt “different” than usual, your body may have been signaling that its mineral reserves were running low.
In Total Body ReSet for Men, I point out another challenge many active people don’t recognize. Commercial electrolyte drinks are often laced with sugar and salt but not the minerals that need to be replaced. As I write in the book, many are essentially “sugar water with no magnesium.”
That doesn’t mean hydration isn’t important. Quite the opposite.
It means that hydration works best when water and minerals work together.
The goal isn’t to create fear around exercise. It’s to recognize that movement increases nutritional demand, and meeting that demand helps the body recover and adapt.
Build a Strong Foundation with Heart Health Minerals
Whenever someone asks me how to prepare for a new exercise routine, my answer is surprisingly simple.
Don’t just train your muscles. Support your cells.
You’re not just burning calories… you’re burning nutrients
- Begin with hydration, but think beyond water alone. Minerals provide much of the foundation that allows hydration to work effectively throughout the body.
- Eat nutrient-dense foods that naturally supply electrolytes and trace minerals. Leafy greens, nuts, seeds, vegetables, and quality protein all contribute to that foundation.
- Give your body adequate recovery between challenging workouts.
- And remember that consistency almost always beats intensity.
For people looking for additional nutritional support, I developed ReMyte to provide a broad spectrum of picometer-sized ionic minerals, including magnesium, potassium, selenium, zinc, and other trace minerals that modern diets often fail to provide in sufficient amounts. I generally recommend thinking about minerals as part of your hydration routine—adding them to water before exercise and replenishing again afterward—as one way to support the body’s natural recovery process.
On days involving longer or more demanding exercise, I also pay particular attention to selenium because of its role in supporting the body’s antioxidant defenses during periods of higher physical stress.
These Are The Nutritional Building Blocks.
And that’s an important distinction.
Sustainable Fitness Starts with Cellular Nutrition
Ultimately, As you consider training smarter, I encourage you to think beyond the workout itself.
Minerals matter.
Recovery matters.
Nutrition matters.
Sleep matters.
Exercise doesn’t strengthen the body during the workout. It creates the stimulus for adaptation. The rebuilding happens afterward, when your cells have the nutrients they need to repair, recover, and become more resilient.
That’s why I encourage people to think about cardiovascular fitness as a partnership.
Movement provides the challenge.
Nutrition provides the raw materials.
Together, they create lasting progress.
So if you’re inspired by this summer’s walking trends, planning to return to running, or simply hoping to spend more time outdoors, I encourage you to begin with a strong foundation.
Your heart doesn’t need punishment.
It needs support.
Build that support at the cellular level, and every step you take has the opportunity to become an investment not only in your fitness today, but in your cardiovascular health for years to come.
This is exactly why I developed ReMyte.
Rather than replacing health tracking, it complements it by focusing on something no wearable can currently measure: the mineral environment inside your cells. ReMyte provides a modest amount of magnesium. It also includes a full spectrum of picometer-sized ionic minerals designed to support cellular absorption and overall mineral balance.
It’s not a substitute for tracking your sleep, your HRV, or your glucose.
It’s the nutritional foundation those measurements may be reflecting.
Technology tells you what’s happening.
Cellular nutrition helps explain why.
The Data Is Only Half the Story
Wearable technology has helped people become more engaged with their health.
But I also hope we don’t lose sight of something even more important.
Your body is more than a collection of numbers on a dashboard.
- Behind every sleep score is a brain trying to restore itself.
- Behind every HRV reading is a nervous system adapting to stress.
- Behind every glucose graph are billions of cells working to produce energy from the nutrients you’ve given them.
The real question isn’t whether your wearable is collecting enough information.
It’s whether your cells have the raw materials they need to do their jobs well.
Once you understand the link between magnesium and wearable technology, your data starts to mean something different. You can still wear your Oura Ring, check your HRV, and learn from your glucose monitor.
But don’t stop there.
Use the data as an invitation to look deeper—because the most important part of your health isn’t what your wearable can measure.
It’s what your cells have been trying to tell you all along. Be the n=1 research subject and measure how our formulas are making your body work on all cylinders and not just plugging along like a worn out bicycle.
This content is for educational purposes only and discusses nutritional and lifestyle support for normal structure and function of the body. It is not intended to diagnose, treat, or cure disease. Consult a qualified healthcare professional for personal medical guidance.
👉 About the book:
Magnesium: The Missing Link to Total Health
Go deeper than the data. Support your cellular nutrition with ReMyte—the mineral foundation that complements what your wearable tracks but can never measure.
👉 Learn more and become a member here:
https://drcarolyndean.com/wellness-courses/
