Excess weight isn’t just about the numbers on the scale; it places a constant strain on vital organs, including the lungs. Physicians are warning that being overweight increases the risk of severe respiratory illnesses, ranging from sleep apnea to acute respiratory failure, and can significantly worsen existing lung conditions.
“Obesity has all the characteristics of an epidemic: exponential growth, global spread, and ‘transmissible’ factors – and we’re talking about diet, lifestyle, and a sedentary existence,” explains Cristian Oancea, a pulmonologist. “This disease creates a mechanical restriction on the lungs, increases the risk of respiratory diseases – in addition to cardiovascular issues, diabetes, or cancer – with a major impact on quality of life and mortality. If we were to rank the burden of obesity, the lungs bear between 15 and 25 percent, surpassed only by the liver – 30-40 percent – and the cardiovascular system – between 25 and 35 percent.”
How Obesity Impacts Lung Function
Excess adipose tissue, particularly around the abdomen and chest, limits diaphragm movement and reduces lung volume. Over time, this mechanical restriction can lead to sleep apnea, impaired breathing control, and the development of significant restrictive ventilatory dysfunction. This connection highlights the importance of maintaining a healthy weight for overall respiratory health.
obesity influences respiratory mechanics and promotes chronic inflammation, directly impacting pulmonary immunity and the lung microbiome.
“In obese patients, we’re talking about a major risk of bacterial bronchitis and pneumonia, recurrent viral or bacterial respiratory infections, and complex respiratory pathologies such as pulmonary embolism, pulmonary hypertension, or acute respiratory distress syndrome – a severe form of respiratory failure,” the specialist warns. “Obstructive or restrictive pathology, and even pulmonary fibrosis, can also occur. Changes in pharmacokinetics and pharmacodynamics can affect the effectiveness of antibiotics.”
Another significant risk is the onset or worsening of asthma. Fat accumulation around the abdomen and chest causes the lungs to function at a reduced volume, leading to premature closure of small airways and increased bronchial reactivity. Obese patients may develop respiratory symptoms even without a prior diagnosis of lung disease.
Obesity Worsens Asthma
For individuals already living with asthma, excess weight can be the difference between stable management and severe decompensation, with an increased risk of intensive care unit admission.
Physicians emphasize that weight loss, regular physical activity, and periodic monitoring of lung function can substantially reduce the risk of complications. Maintaining a healthy lifestyle is crucial for managing respiratory health, especially for those with pre-existing conditions.
“Essentially, obesity alters functional respiratory parameters even in people who have not been diagnosed with a lung disease up to that point. And in patients who already have a respiratory pathology, excess weight can mean the difference between controlled progression and severe decompensation, which implies a higher risk of admission to intensive care. Controlling body weight, engaging in sports and regular physical activity, and periodic functional respiratory assessments can significantly reduce the risk of complications,” the physician concludes.
