The Surprising Link Between Strength Training and Heart Health

When most people think about exercise for heart health, they picture running. Cycling. Cardio machines. Anything that gets the heart rate up and keeps it there.

Strength training and heart health rarely are on the radar.

That’s a gap worth closing — because the research on resistance training and cardiovascular health is compelling, consistent, and largely underappreciated by the general public.

Here’s what the science actually says.

THE HEART IS A MUSCLE

This sounds obvious, but it has real implications.

Like every other muscle in your body, the heart adapts to the demands placed on it. Consistent exercise — including strength training — produces structural and functional changes that make the heart more efficient.

The left ventricle, which pumps blood to the body, can increase in volume and strength with regular training. This means more blood ejected per beat — a more powerful pump doing less work to produce the same output.

The result is a lower resting heart rate. A well-trained heart doesn’t need to beat as often to circulate the same amount of blood. Athletes who have trained for years often have resting heart rates in the 40s and 50s. Average sedentary adults are typically in the 70s or higher.

WHAT STRENGTH TRAINING DOES TO YOUR CARDIOVASCULAR SYSTEM

Here’s what happens inside your body during a set of heavy squats or deadlifts:

Your heart rate elevates significantly — often into the moderate-to-vigorous intensity range that research associates with cardiovascular benefit.

Your cardiovascular system works to deliver oxygen and fuel to a large amount of working muscle simultaneously — a significant demand.

Blood vessels dilate to accommodate increased blood flow. Over time, consistent training improves the flexibility and function of blood vessel walls — reducing arterial stiffness, which is an independent risk factor for cardiovascular disease.

After the session, your heart rate remains elevated above baseline for an extended period as your body recovers — a phenomenon called EPOC (excess post-exercise oxygen consumption) that represents continued cardiovascular work.

THE RESEARCH IS CLEAR

Multiple large-scale studies have examined the relationship between resistance training and cardiovascular health outcomes. The findings are consistent:

A 2019 study published in Medicine & Science in Sports & Exercise found that strength training for less than one hour per week was associated with a 40-70% reduced risk of cardiovascular events — independent of aerobic exercise participation. That means even people who didn’t do dedicated cardio got significant heart health benefits from lifting.

The American Heart Association now officially recommends strength training twice per week as part of a heart-healthy exercise program — not as optional, but as a core component.

Research has shown that resistance training produces significant reductions in resting blood pressure — comparable to some blood pressure medications — in people with hypertension.

Strength training improves HDL cholesterol (the protective kind) and reduces LDL and triglycerides in many populations.

It improves insulin sensitivity and glucose regulation — reducing risk for type 2 diabetes, which is itself a major cardiovascular risk factor.

DOES STRENGTH TRAINING REPLACE CARDIO?

This is the natural follow-up question. The answer is nuanced.

For general cardiovascular health — the heart disease prevention and metabolic benefits — strength training provides significant benefits that were previously thought to require aerobic exercise.

For specific cardiovascular performance goals — improving VO2 max, training for endurance events, maximizing cardiovascular efficiency — dedicated aerobic training still plays an important role.

For most people who simply want to be healthy, live long, and feel good: a well-designed strength training program that gets your heart rate up, combined with regular daily movement (walking, activities you enjoy), covers the cardiovascular health bases without requiring hours on a treadmill.

At Forge, we don’t frame it as cardio versus lifting. We build programs that develop both — using compound strength movements as the foundation and adding conditioning work that elevates heart rate in ways that are both effective and engaging.

THE OFTEN-OVERLOOKED CARDIOVASCULAR BENEFITS OF BUILDING MUSCLE

Here’s a less-discussed mechanism through which strength training protects your heart:

Muscle tissue is one of the primary sites where glucose is stored and used. More muscle mass means more capacity to clear glucose from the blood — reducing blood sugar spikes and improving insulin sensitivity.

Chronic elevated blood sugar and insulin resistance are major drivers of cardiovascular disease. They accelerate arterial damage, increase inflammation, and disrupt lipid profiles.

By building and maintaining muscle mass, you’re not just getting stronger. You’re improving the metabolic environment that determines your long-term cardiovascular risk.

WHAT THIS MEANS PRACTICALLY

You don’t have to choose between lifting and cardio. They complement each other.

But if you’ve been under the impression that strength training is only for aesthetics or athletic performance — and that “real” heart health requires logging miles — the research challenges that assumption directly.

Twice-a-week compound strength training, done consistently, is one of the most protective things you can do for your heart. It lowers blood pressure, improves cholesterol, reduces glucose, and makes the heart itself more efficient.

At Forge, cardiovascular health is one of the outcomes we track and care about — not just the weights on the bar.

If heart health is part of why you want to start training, your free no sweat intro at forge-fitness.net is the place to start that conversation.