Does climbing stairs actually do anything for my heart?
Yes, climbing stairs genuinely does something for your heart. Climbing roughly 50 to 100 steps a day is associated with fewer heart attacks, strokes and irregular heart rhythms, though this is based on observational studies, not experiments.
The strongest evidence comes from a study of nearly 459,000 British adults followed for an average of 12.5 years1. Climbing more than five flights of stairs a day, roughly 50 steps, was associated with a 16 to 22% lower risk of a heart attack or stroke. That held true regardless of your genetic predisposition to heart disease. Notably, people who stopped climbing stairs partway through the follow-up period had a 32% higher risk than those who had never done it at all. Sticking with it genuinely matters.
A second study with 117,384 participants and 13 years of follow-up examined stair climbing in combination with diet2. People who climbed 60 to 100 steps a day and followed a Mediterranean or DASH diet had 14 to 22% lower odds of serious heart problems. Above 100 to 150 steps per day, the additional benefit disappeared. There is, in other words, a ceiling effect.
Two Japanese studies add further nuance. One study of 6,575 people found that regular stair climbing was associated with a 31% lower chance of atrial fibrillation, an irregular heartbeat that itself increases the risk of stroke3. That association held up after adjusting for other lifestyle factors. A related analysis showed that frequent stair users also tended to live more healthily in other respects4. Cause and effect are difficult to disentangle there.
A Japanese cohort of 7,282 people followed for an average of 16.6 years initially found a 22 to 28% lower risk among regular stair users5. That association weakened once the researchers adjusted for other healthy habits. This caveat applies to all of these studies: people who take the stairs generally also live more healthily in other ways. The independent effect of stair climbing is therefore hard to isolate.
Whether stair climbing also directly improves heart function in people who already have heart disease remains unclear. A small study of just 18 cardiac patients showed barely measurable improvement after 12 weeks of stair-climbing training6. The study was far too small for firm conclusions and tells us little about healthy individuals.
All studies used are observational, with the exception of one small study in cardiac patients in which participants were randomly assigned. The associations found are not proof of cause and effect: healthier people simply tend to take the stairs more often and also live more healthily in other ways. The largest studies include hundreds of thousands of participants and decades of follow-up, which makes the evidence substantial, but not conclusively causal.
How harmful is prolonged stress really for my heart?
Long-term stress measurably increases your risk of cardiovascular disease, particularly through work-related stress (10-40% extra risk in large population studies). The effect is real, but smaller than that of smoking or high blood pressure.
Is the Mediterranean diet really good for your heart, and why?
For people with an elevated cardiovascular risk, the Mediterranean diet is the best-supported dietary choice currently available. Both large trials and dozens of population studies confirm a lower risk of heart attack and stroke.
Does losing weight noticeably improve my blood pressure and cholesterol?
Losing weight noticeably lowers your blood pressure and improves your cholesterol profile, but which value improves the most depends on your diet. And if the weight comes back, most of the gains disappear along with it.
Is interval training (HIIT) better for my heart than regular cardio?
For cardiac patients in rehabilitation, HIIT produces greater fitness gains on average than regular cardio, but this does not apply to all heart conditions. If you have a heart problem, never simply start HIIT without medical advice first.
Is a calcium score of my heart worth doing?
For people aged 40 to 75 in a grey zone regarding statins, a calcium score is a well-supported tool for making a considered decision about medication together with your doctor.
Does having bad gums affect my heart?
There is a plausible association between severe gum disease and heart problems, but no proven causal relationship. Good oral care is sensible, but whether treating gum disease lowers your cardiac risk has not yet been demonstrated.