As many people in France prepare to enjoy winter in the mountains, a question often arises: is going to altitude truly beneficial for your heart? And what precautions should you take if you have a cardiac condition?
According to the Atout France barometer published in 2025, a third of French people have spent at least one winter stay in the mountains over the past three years. Most of them took part in a snow activity, with skiing still leading the way (40%). A commonly accepted belief suggests that spending time at altitude has health benefits in general, and for the heart in particular — especially when combined with physical activity. This idea is not without foundation. But it also needs to be nuanced, because the mountains can pose risks, especially for people living with heart conditions.
Proven benefits
Let’s start with the benefits — and there are many. Clean air, wide-open landscapes, and physical activity adapted to your level all contribute to a sense of well-being. They counterbalance the sedentary lifestyle, stress, and noise often imposed by urban living. Mountain air, which is purer, colder, and less polluted, makes breathing easier. It is also less humid, which may help reduce certain humidity-related symptoms or allergies.
For the heart, the key factor is the gradual decrease in oxygen. At around 1,345 meters — the average altitude of French ski resorts — the body receives 6 to 7% less oxygen than at sea level. The body adapts: the lungs work harder, and the heart beats slightly faster. This is precisely why many athletes train at altitude to boost endurance.
As a result, even a simple walk becomes an excellent cardiovascular exercise, often more effective than the same effort at low altitude. Hiking, skiing, snowshoeing, mountain biking, and climbing all support better blood circulation.
Exposure to vast and varied natural landscapes also improves mood and reduces anxiety. Neuroscience shows that viewing natural panoramas decreases activity in brain regions associated with stress. Stress can raise blood pressure and heart rate, and trigger the release of hormones such as cortisol — all of which negatively impact the heart. By helping reduce stress, the mountains remain an ally for heart health.
Risks should not be overlooked
Beyond a certain altitude, some people may experience headaches, intense fatigue, or sleep disturbances — all of which can affect the heart. A faster heart rate can be problematic for people with hypertension, arrhythmias, or coronary artery disease. The heart must work harder to deliver enough oxygen to the muscles, leading to rapid shortness of breath, palpitations, chest pain, or dizziness.
The benefits of physical activity can also have a flip side: the elevation and reduced oxygen make every effort more demanding. This combination increases blood pressure and heart rate. For vulnerable individuals, this may trigger tachycardia. People taking beta-blockers may also notice decreased endurance. Cold temperatures add another layer of risk: the body constricts blood vessels to preserve heat, raising blood pressure and forcing the heart to pump harder. Dehydration, frequent in the mountains, thickens the blood and increases cardiac workload. A weakened heart may struggle to handle these stresses.
Precautions to take
Does this mean you should avoid the mountains altogether, especially in winter? Certainly not. But a few simple precautions are important. First, speak with your cardiologist or specialist before planning a trip. They can assess whether a stay at altitude is suitable for you and adjust medication if needed. Another key precaution is to ascend gradually. For example, stopping halfway for a meal before reaching the resort helps your body adapt step by step. Once there, begin activities progressively, paying close attention to any warning signs. With these few measures in place, there is no reason to miss out on the many benefits of a mountain holiday — especially since it is also an opportunity to disconnect, recharge, and lift your spirits, which is indirectly very good for the heart!
