Strength training has long been associated with stronger muscles and healthier bones. Many people also use it to improve balance, boost metabolism, and stay active as they age. Now, new research suggests its benefits reach even further by protecting one of the body's most important organs, the heart.

A large study has found that women who regularly perform strength training have a much lower risk of heart attacks than those who skip resistance exercise. The findings add to growing evidence that lifting weights is not just about fitness. It can also become an important part of long-term heart health.

The research, published in the Journal of the American College of Cardiology, followed more than 117,000 women for nearly 15 years. Scientists examined exercise habits alongside cardiovascular health to better understand how resistance training affected long-term outcomes.

The results stood out immediately. Women who completed at least two hours of strength training each week had a 20% lower risk of major cardiovascular disease. Even more impressive, they experienced a 44% lower risk of heart attacks compared with women who performed no resistance training.

Researchers also discovered that the benefits increased with consistency. Every additional hour of strength training each week was linked to a 5% lower risk of major cardiovascular disease. Heart attack risk dropped by another 14% with each extra weekly hour of resistance exercise.

Strength Training Works Best With Other Healthy Habits

Felix / Pexels / The study suggests that regular strength training provides lasting protection instead of offering only short-term fitness improvements.

Although resistance exercise delivered impressive results on its own, the greatest benefits came from combining it with other healthy behaviors. Researchers found that women following three important lifestyle habits experienced the lowest cardiovascular risks.

The first habit involved completing at least 150 minutes of moderate-intensity aerobic exercise each week. The second included regular strength training. The third focused on reducing sedentary behavior, measured in the study as watching less than two hours of television each day.

Women who followed all three recommendations showed the strongest protection against heart disease, heart attacks, and stroke. Combining aerobic exercise with at least two hours of weekly resistance training lowered heart attack risk by 45% compared with women who remained physically inactive.

Why Lifting Weights Helps the Heart?

Many people associate heart health almost entirely with walking, running, cycling, or swimming. Those activities remain extremely valuable because they directly challenge the cardiovascular system.

Strength training supports heart health through different pathways. Building muscle improves the body's ability to regulate blood sugar, maintain healthy metabolism, and use energy more efficiently. Those improvements reduce several major risk factors linked to cardiovascular disease.

Researchers also believe resistance training may improve blood flow and support healthier blood vessels. Better circulation helps the heart work more efficiently while improving the delivery of oxygen and nutrients throughout the body.

The study also suggests strength training may influence how the body processes fats and how stable plaque remains inside arteries. Those changes may help explain why resistance exercise showed particularly strong protection against heart attacks.

Current Guidelines Already Recommend Strength Training

Cotton Bro / Pexels / Health experts have encouraged strength training for years, but many adults still overlook it.

Some people believe lifting weights is only for athletes or bodybuilders. Others focus entirely on walking or cardio workouts while skipping resistance exercises altogether.

Current U.S. physical activity guidelines recommend at least two days of muscle-strengthening activities each week. Adults should also complete at least 150 minutes of moderate-intensity aerobic exercise every week for overall health.

The new findings strengthen those existing recommendations. Instead of treating strength training as optional, the research suggests it should become a regular part of a balanced exercise routine.