What Is HRV? Why Every Man Over 40 Should Track Heart Rate Variability

Why I Started Tracking My HRV (And Why Every Man Over 40 Should Pay Attention)

Hey everyone,

As you may already know, I'm 47 years old, a husband, dad of two boys, Land Surveyor, and someone who's trying to stay strong, healthy, and capable for as long as possible.

Like most people, when I first got a smartwatch, I mainly cared about the basics:

• Steps
• Calories burned
• Heart rate
• Sleep hours

Then I started noticing a metric called HRV.

At first, I had absolutely no idea what it meant.

I kept seeing articles, podcasts, doctors, longevity experts, and performance coaches talking about HRV like it was some secret health score.

So naturally, I started researching it.

The more I learned, the more I realized HRV may be one of the most useful indicators of recovery, stress, sleep quality, and overall health that most people have never heard of.

What Is HRV?

HRV stands for Heart Rate Variability.

It sounds complicated, but the concept is actually pretty simple.

Most people think a healthy heart beats like a perfectly timed machine:

Beat...

Beat...

Beat...

Beat...

Exactly the same every time.

But that's not how a healthy heart works.

A healthy heart is constantly making tiny adjustments based on what your body needs at that moment.

The time between heartbeats is always changing slightly.

For example:

• 0.92 seconds
• 1.04 seconds
• 0.97 seconds
• 1.08 seconds

Those tiny differences are what HRV measures.

The higher the variation, generally speaking, the higher your HRV.

Wait... Doesn't a Steady Heart Mean a Healthy Heart?

This surprised me too.

You'd think a perfectly steady heartbeat would be ideal.

But a healthy body needs flexibility.

Think about driving a truck.

A truck with responsive steering can easily adapt to curves, bumps, and obstacles.

A truck with stiff steering struggles to adjust.

Your nervous system works the same way.

A healthy body constantly adapts to:

• exercise,
• stress,
• recovery,
• sleep,
• work,
• emotions,
• and daily life.

HRV gives us a glimpse into how well our body is making those adjustments.

Your Heart Doesn't Control HRV

This was one of the biggest things I learned.

HRV isn't really measuring your heart.

It's measuring how your nervous system controls your heart.

Specifically, it's measuring the balance between two systems:

The Fight-or-Flight System

This is called the sympathetic nervous system.

It's what activates when:

• You're exercising
• You're stressed
• You're rushing
• You're dealing with pressure
• You're facing a challenge

This system is necessary.

Without it, we couldn't perform.

The Rest-and-Recover System

This is called the parasympathetic nervous system.

This is the recovery side.

It's responsible for:

• Healing
• Digestion
• Recovery
• Relaxation
• Sleep

The healthier and more balanced these systems are, the higher your HRV tends to be.

Why Does HRV Matter?

Because it reflects many of the things we're trying to improve anyway.

Better Recovery

When you're recovering well, your body has more resources available for adaptation and repair.

A higher HRV often suggests your body is handling training and life stress effectively.

Better Sleep

I've personally noticed this one.

When I get a great night's sleep, especially with good deep sleep and REM sleep, my HRV is often higher the next morning.

When I sleep poorly, it's usually lower.

Lower Stress

Your body doesn't really care whether stress comes from:

• work,
• finances,
• family issues,
• lack of sleep,
• or hard exercise.

Stress is stress.

When stress accumulates, HRV often drops.

Better Cardiovascular Fitness

People who consistently exercise and improve their cardiovascular health often see improvements in HRV over time.

Their hearts become more efficient.

Their recovery improves.

Their nervous systems become more adaptable.

A More Resilient Nervous System

This may be the biggest benefit of all.

A resilient nervous system can handle challenges and then return to a recovery state more quickly.

That's important for longevity.

It's important for recovery.

And it's important for everyday life.

What Affects HRV?

I've learned that HRV is influenced by many things.

Some raise it.

Some lower it.

Things That Often Improve HRV

• Quality sleep
• Regular exercise
• Good hydration
• Healthy body weight
• Stress management
• Morning sunlight
• Good nutrition
• Consistent recovery habits

Things That Often Lower HRV

• Poor sleep
• Alcohol
• Illness
• Chronic stress
• Dehydration
• Overtraining
• Poor nutrition
• Recovery deficits

One of the most interesting things is that many people can literally see the effects of poor sleep or alcohol consumption on their HRV the next morning.

The Most Important Thing About HRV

Don't compare your HRV to somebody else's.

A 25-year-old endurance athlete may have an HRV of 90.

A healthy 47-year-old father may have an HRV of 45.

Both can be perfectly healthy.

What matters most is your trend over time.

If your HRV is slowly improving over months while you're:

• sleeping better,
• exercising regularly,
• managing stress,
• eating better,
• and recovering properly,

that's usually a very good sign.

The goal isn't to chase someone else's number.

The goal is to become healthier than you were yesterday.

Can Supplements Help Support HRV?

Yes—but before we talk about supplements, I want to be clear about something.

No supplement can replace bad habits.

If you're sleeping five hours a night, eating junk food, never exercising, staying stressed out 24/7, and scrolling your phone until midnight, no supplement is going to magically fix that.

Supplements should support good habits.

They shouldn't replace them.

Once the fundamentals are in place, there are several supplements that may help support some of the factors associated with healthy HRV.

Omega 3 Fish Oil

Omega-3s are one of the most researched supplements available.

Research suggests they may support:

• Heart health
• Cardiovascular function
• Reduced inflammation
• Brain health

Since HRV is closely linked to nervous system and cardiovascular health, Omega-3s may indirectly support healthier HRV levels over time as part of an overall healthy lifestyle.

Magnesium Glycinate

Magnesium is involved in hundreds of processes throughout the body.

It plays important roles in:

• Muscle relaxation
• Nervous system regulation
• Stress management
• Sleep quality

Many people find magnesium glycinate particularly helpful because it's highly absorbable and easy on the stomach.

Since sleep and stress are two major drivers of HRV, magnesium can be a useful recovery tool.

Ashwagandha

Ashwagandha is an adaptogen, which means it may help the body better manage stress.

Stress is one of the biggest factors that can negatively affect HRV.

Several studies suggest Ashwagandha may support healthy cortisol levels and improve perceived stress levels, which may contribute to better recovery and overall nervous system balance.

Nitric Oxide Support

Nitric oxide supplements are often discussed for exercise performance and blood flow.

Healthy circulation and cardiovascular function are important components of overall health and recovery.

While nitric oxide supplements aren't directly marketed as HRV supplements, supporting cardiovascular performance and exercise capacity may indirectly support many of the same systems associated with HRV.

What I've Personally Learned

The more I learn about health, the more I realize everything is connected.

Exercise affects sleep.

Sleep affects recovery.

Recovery affects stress.

Stress affects HRV.

HRV reflects how all those systems are working together.

That's why I pay attention to it.

Not because I obsess over the number.

But because it gives me feedback.

It's another tool that helps me understand whether my body is recovering, adapting, and moving in the right direction.

Final Thoughts

For years I thought health was mostly about working out harder.

Today I see things differently.

Exercise matters.

Nutrition matters.

Hydration matters.

Supplements matter.

But recovery matters too.

And HRV gives us a window into that recovery.

If you're over 40 and trying to stay strong, mentally sharp, physically capable, and present for your family, HRV is worth paying attention to.

You don't need to become obsessed with the number.

Just use it as another tool to help you build better habits.

Because the goal isn't just to live longer.

The goal is to stay healthy, strong, and capable while you're living.

Stay dangerous,

Omar