Does regular exercise help against that creeping chronic inflammation?

Yes, exercise demonstrably suppresses that smouldering low-grade inflammation. Working muscles produce a substance that inhibits TNF-alpha, a pro-inflammatory agent that plays a role in insulin resistance and atherosclerosis. Both animal and human studies support this relationship^1,2,3. The exact optimal dose is not yet known.

It has been studied most thoroughly in people with type 2 diabetes and excess weight. A meta-analysis of 20 studies involving more than 1,200 participants showed that a combination of cardio and strength training measurably lowers inflammatory markers compared with standard care alone⁴. The quality of evidence is moderate and there is some uncertainty in the underlying studies, but the direction is consistently positive.

In frail older adults, the anti-inflammatory effect goes hand in hand with less cellular damage, better-functioning energy factories in the cells, and increased cellular clean-up processes⁵. A tailored mix of strength, endurance, balance, and flexibility training works better than a single type of training. In people with COPD, structured exercise rehabilitation helps suppress inflammation, improves vascular function, and lowers the risk of an acute flare-up⁶.

The strongest evidence concerns cardiovascular disease and premature death. Large studies consistently show that better fitness and more physical activity reduce that risk^7,8. Inflammation is one of the mechanisms involved, alongside effects on blood pressure, lipid metabolism, and cardiac function.

There are limits as well. In rheumatic conditions such as rheumatoid arthritis, the effect is biologically plausible, but direct evidence is scarce and contradictory³. For indirect protection via inflammation against muscle loss, dementia, or bone loss, the relationship is plausible, but the causal pathway has not yet been fully established².