A new scientific review argues that regular physical activity should be treated as seriously as medicine for preventing chronic disease. The review, published in Cell Metabolism, examined the concept of “exercise as medicine” for the treatment of non-contagious diseases, also known as chronic lifestyle diseases.
Researchers synthesized evidence on how regular physical activity can prevent the onset and slow the progression of conditions such as cardiovascular disease, type 2 diabetes, cognitive diseases, and certain cancers. According to research cited in the review, physical activity acts as primary prevention against 35 chronic diseases and conditions.
The review found that while global life expectancy has increased dramatically in the last century, from the mid-40s to the mid-70s and 80s, “healthspan” has not kept pace. Healthspan refers to the years people remain healthy and free from chronic disease. The authors note that people are living longer but not necessarily living better, with the latter half of life often spent taking medicines, staying at home, and relying on machines.
Exercise and weight loss
The researchers acknowledge that many people exercise primarily to lose weight. They caution that, if weight loss is the goal, exercise alone may lead to disappointment. One study cited in the review found that while diet decreased body weight by 8.5 percent, exercise performed five days per week, totaling 225 minutes, only decreased body weight by 2.4 percent.
However, even without visible changes on the scale, exercise still provides long-term benefits. The returns from physical activity appear in disease prevention and extended healthspan, not just in weight. The review calls this a critical mindset shift, stating that success in exercise is not about pounds lost but about diseases prevented and years of health gained.
Physical activity and disease risk
The review provides strong evidence that exercise should be prescribed as seriously as medicine for several chronic conditions. For cardiovascular diseases, regular physical activity protects the heart and vascular system. For type 2 diabetes, exercise helps regulate blood sugar and improve insulin sensitivity. For cognitive diseases, movement supports brain health and may slow cognitive decline. For certain cancers, physical activity is linked to reduced risk of several types.
The researchers also note that a lack of physical activity does not just increase disease risk on its own. It amplifies other risk factors such as obesity and hypertension, with the effects compounding over time.
Current physical activity levels
Despite the overwhelming evidence that movement is beneficial for health, only about one-quarter of adults currently meet recommended physical activity guidelines. The review states that even though most people know exercise is good for them, there is a significant gap between awareness and action.
The authors emphasize that consistent movement, whatever form it takes, is one of the most effective things people can do for long-term health. Whether through walking, strength training, swimming, or dancing, the goal is to move regularly in a way that is sustainable. The review concludes that exercise is the best first-line defense against over 30 chronic diseases and that regular physical activity is one of the most evidence-backed ways to close the gap between lifespan and healthspan.
