And here’s the part that stung: I’m a trainer. I had been working out consistently. I thought I was doing the work. But my body was telling me something different — that despite years of experience and good intentions, I had drifted into training that was no longer creating the stimulus my muscles needed to stay strong and metabolically active.

If it can happen to me, it can happen to anyone.

Your doctor checks your cholesterol. Your blood pressure. Your blood glucose. Occasionally, your resting heart rate.

Almost certainly not your VO2 max.

And yet, study after study has ranked cardiorespiratory fitness — measured by VO2 max — as the single strongest predictor of all-cause mortality. See the Companion Video.

How hard you can squeeze your hand predicts your risk of cardiovascular disease, cognitive decline, fall injury, surgical outcomes, hospital readmission, and all-cause mortality.

Here’s something that may surprise you: if you wear a Garmin, an Apple Watch, a Whoop band, or an Oura Ring to bed at night, there is a very good chance your device has been quietly measuring this metric for months — possibly years — without you paying much attention to it.

It’s called Heart Rate Variability. HRV.

According to the National Osteoporosis Foundation, osteoporotic fractures in men over 50 are more common than heart attack, stroke, and prostate cancer combined.

Read that again.

More common than prostate cancer. And yet men are almost never screened for bone density the way they are screened for prostate cancer.

Resting heart rate — RHR — is simply the number of times your heart beats per minute when your body is at complete rest. Not during exercise. Not after climbing a flight of stairs. At rest — ideally first thing in the morning, before you get out of bed, before coffee, before the day begins.

It is the baseline rhythm of your cardiovascular system. Like all baselines, it tells you far more when you track it over time than when you check it once.

Walk into almost any gym and you’ll see the same machines being used over and over again. They look safe. They feel controlled. And they’re often marketed as “joint-friendly” alternatives to free weights.

But research tells a different story.

Some of the most popular gym machines are overrated, offering less functional strength transfer while placing greater stress on joints than smarter, simpler alternatives.

In this article, we’ll break down two of the most overrated gym machines — the leg extension machine and the Smith machine squat — and explain what the science actually says about them.

If you’ve hit your 40s or 50s and suddenly feel like your workouts aren’t delivering the same results they used to, you’re not imagining it. Many people notice a frustrating shift: progress slows down, muscle is harder to build, and workouts that once felt productive start to feel… ineffective.

But here’s the good news:

Your body is still fully capable of building strength, muscle, mobility, and power — you just need a smarter strategy.

Let’s break down why workouts stop working after 40, what’s happening physiologically, and exactly how to fix it.

Most people think their progress slows down because they’re not training hard enough… but the research says otherwise.

The real reason many adults over 40 see stalled strength, poor performance, and constant fatigue is simple: under-recovery.

Studies show that inadequate sleep, low protein intake, and insufficient rest days can reduce strength and muscle gains by up to 30% — even when you’re training consistently.

Your muscles grow between workouts, not during them.

Dial in your recovery, and you’ll get better results from the same amount of effort.

This is the cheat code most people miss.

— Marty Trussell, NASM-CPT | VirtaFitness

Many recreational runners believe that pounding pavement is enough to reach their goals. But if you want to run stronger, avoid injuries, and even clock better race times, strength training is a must-have tool in your toolbox. Strength training, simply put, involves using resistance to build muscular power and endurance. This could be lifting weights, using resistance bands, or even bodyweight exercises.

Have you ever arrived at your local gym after a day at work only to find that there is a line to use the cable machines? Find out why are they so popular and learn the best exercises to perform using them. Watch video version: https://youtu.be/0H8qMt9qRpU

Designing an effective workout program involves several key factors that help maximize results and ensure safety. Here are some tips to consider when designing your workout program.

I was recently certified to teach Les Mills RPM classes. RPM stands for Raw Power in Motion and it is a cardio peak cycle workout that uses a great selection of music, simulated climbs and sprints to burn calories and improve cardio fitness. Learn more…

Outdoor training can have numerous benefits for both physical and mental health. Here are six of them:

Watch video version: https://youtu.be/8RVnC8U5VOc

Staying motivated and focused on fitness goals can be a challenge, but there are some tips and advice that can help.

Working with a personal trainer can benefit individuals looking to improve their fitness levels, achieve specific goals, or simply maintain a healthy lifestyle.

Watch video version: https://youtu.be/7mNYwWdJeY4

Preparing for cycling season involves building endurance, increasing strength and flexibility, and improving cardiovascular fitness. Here is a sample fitness routine that can help you get ready for cycling season.

Watch video version: https://youtu.be/_RI7vD_OU8w

Your metabolism is not a game you can “reset” or cheat (up, down, left right, B, A, Start?). It is made up of several components. While it is not cheatable, per se, some components are modifiable. Find out how…

Rest days are crucial for individuals who engage in resistance training for several reasons. Here are a few of the most important…

Watch video version: https://youtu.be/Ium2tElAysI

Recently one of my older male clients sent me a link to an article in the Washington Post that claimed that grip strength was an indicator of longevity, or how long a person is expected to live. He asked me if it were true. Here’s what I found.