Strength Training and Heart Health: What a New Study in Women Can—and Cannot—Tell Us

The short answer

In a large observational study, women who reported two or more hours of resistance training each week had lower rates of major cardiovascular events and heart attacks than women reporting none. The study shows an important association, not proof that lifting caused the lower risk. Strength training belongs alongside aerobic activity, less sitting and the wider picture of cardiovascular care.

Strength training is not only about muscle

Many women come to strength training because they want to feel stronger, build muscle, support bone health or feel more confident in their clothes. All of those reasons count. But strength training also belongs in the conversation about long-term heart health.

A 2026 study in the Journal of the American College of Cardiology followed 117,025 women from two long-running US cohorts for an average of 14.5 years. The researchers examined reported resistance training alongside aerobic activity, television viewing and later cardiovascular events. Women reporting at least two hours of resistance training each week had a 20% lower rate of major cardiovascular events than women reporting none. The association was stronger for heart attack: the rate was 44% lower in the group reporting at least two hours each week.[1]

That is encouraging, particularly because women have historically been underrepresented in exercise research. It is not, however, a reason to promise that lifting weights prevents heart attacks. Understanding the difference helps us use research intelligently rather than turning a useful result into a frightening or unrealistic health rule.

What the study actually found

The study used data from the Nurses' Health Study and Nurses' Health Study II. Participants reported their physical activity repeatedly over time, rather than answering only once at the start. The researchers counted major cardiovascular events as non-fatal or fatal heart attack, stroke, coronary bypass surgery or coronary angioplasty.

Compared with women reporting no resistance training, those reporting two or more hours a week had a lower rate of major cardiovascular events overall. Each additional weekly hour of resistance training was associated with a 5% lower rate of major cardiovascular events. The association was especially clear for heart attack, while the study did not find a similar association for stroke when resistance training was considered on its own.[1]

The wider pattern was important too. Women who combined recommended amounts of aerobic activity, regular resistance training and lower television viewing had the lowest observed cardiovascular risk. This supports a simple but valuable message: heart health is not created by one perfect workout. It is shaped by a collection of repeated behaviours over years.

The study also found stronger associations among women who maintained resistance training more consistently and among those who trained both upper and lower body. That does not mean every workout needs to train every muscle. It is a useful reminder that a rounded, repeatable routine is likely more valuable than a short burst of highly focused training.

Why association is not proof

This was a prospective observational study. Researchers observed what women reported doing and how their health changed over time; they did not randomly assign one group to lift weights for fifteen years and another group not to.

Women who train regularly may also differ in other ways that influence cardiovascular health. They may have different diets, sleep patterns, healthcare access, smoking habits, stress levels, income, prior health or confidence with movement. The researchers adjusted for many relevant factors, which strengthens the analysis, but adjustments cannot remove every possible difference.

So the fair conclusion is not: "Two hours of weights will reduce your heart-attack risk by 44%." The fair conclusion is that regular resistance training was strongly associated with lower cardiovascular risk in a very large group of women, and that finding fits a broader body of evidence supporting strength work as part of a healthy movement pattern.[1][3]

This distinction does not make the research less useful. It keeps the article honest. You do not need certainty about every biological pathway before choosing a form of movement that can improve strength, function and confidence while likely supporting several aspects of long-term health.

Strength does not replace cardio

The study is not an argument to stop walking, running, cycling, swimming or doing any aerobic activity you enjoy. Public-health guidance recommends both aerobic activity and muscle-strengthening work. For adults, a common benchmark is at least 150 minutes of moderate-intensity aerobic activity each week, plus muscle-strengthening activity involving the major muscle groups on two or more days.[2]

These forms of movement do different, overlapping jobs. Aerobic activity challenges the heart and lungs in one way; resistance training asks muscles to produce force against an external load. A brisk walk, a bike ride, a set of rows and a squat pattern can all belong in the same week without competing for the title of "best" exercise.

The most useful programme is the one that fits your actual life. A woman caring for young children, working full-time or returning to exercise may not have space for a complex split programme and five cardio classes. Two short full-body sessions plus ordinary walking can be a meaningful beginning. More can be added when it genuinely fits, not because a health headline made the starting point feel inadequate.

What two real-life strength sessions can look like

A session does not need to involve a gym, a barbell or an exhausting circuit. A simple full-body session can include one lower-body movement, one hip-hinge or bridge pattern, one upper-body push, one pull and a manageable core or carry exercise. At home, that might look like chair squats, glute bridges, incline push-ups against a counter, one-arm backpack rows and a dead bug variation.

At a gym, the same idea might be a leg press or goblet squat, Romanian deadlift, chest press within a comfortable range, seated row and a carry. Start with loads and repetitions you can control. Leave room for technique, breathing and recovery rather than treating every set as a test of willpower.

Training both arms and legs over the week is a sensible broad goal. It is not a demand for symmetry or a reason to push through sharp pain, dizziness, chest discomfort or unusual breathlessness. If you have diagnosed cardiovascular disease, uncontrolled blood pressure, concerning symptoms or a medical condition affecting exercise, ask your clinician which starting point is appropriate for you.[3]

Progress can be modest. Add a repetition, choose a slightly heavier dumbbell, improve control or simply repeat two sessions for several weeks. A routine that survives busy weeks is far more valuable than an impressive plan abandoned after ten days.

A stronger heart-health message

The headline is not that women need to become weightlifters to earn heart health. It is that strength training deserves to be taken seriously as part of a whole-life approach to cardiovascular health.

Move in ways you can repeat. Train your major muscle groups. Walk or do other aerobic activity you enjoy. Break up long stretches of sitting where you can. Eat in a way that supports your energy and health, sleep when life allows it, and seek medical care for risk factors or symptoms that deserve attention.

For this week, two strength sessions are a useful target if they are realistic for you. Not because they guarantee a particular outcome, but because they are one practical way to invest in the strength and capacity you want your future self to have.

A note on this article

This article is general education, not individual cardiovascular advice. Strength training does not replace assessment, medication or treatment recommended by a qualified clinician. Seek urgent medical care for chest pain, severe shortness of breath, fainting or other acute symptoms.

A practical example

A practical starting week could include two full-body strength sessions and several walks. You do not need two-hour gym sessions: consistency, an appropriate starting point and training both upper and lower body matter more than a perfect programme.

Try this next

Choose two realistic strength-training windows this week. Make one session include a lower-body movement and one an upper-body push or pull.

Want more structure?

This article is a useful starting point. How to Start Strength Training at Home offers a more complete framework to keep building on it.

Explore How to Start Strength Training at Home →