Does regular exercise help against that creeping chronic inflammation?
Regular, moderate exercise demonstrably lowers inflammatory markers such as CRP and IL-6; training too intensely can reverse that effect, so moderate exercise three to five times per week is the best-supported choice.
Moderate, regular exercise measurably lowers the two most commonly measured inflammatory markers, CRP and IL-6. In a cohort of more than a thousand older men, every additional ten minutes of moderate to vigorous exercise per day was associated with 3 to 6 percent lower levels of these substances. After twelve weeks of combined cardio and strength training (three times per week), CRP in both younger and older previously inactive participants dropped to the level seen in people who were already active.
The mechanism behind this is by now reasonably well described. During exertion, muscle tissue produces a substance that in turn suppresses the production of the inflammatory substance TNF-alpha and drives anti-inflammatory signals. In this way, muscles act as a kind of endocrine organ with an inhibitory effect on creeping inflammation. Scientists link this to a lower risk of conditions such as type 2 diabetes and cardiovascular disease.
Intensity does matter. Six weeks of moderate continuous training lowered TNF-alpha and depressive symptoms in students. High-intensity interval training also reduced depressive symptoms, but actually raised TNF-alpha and IL-6 compared to the moderate group, and led to greater perceived stress. A single, very heavy exercise session had virtually no demonstrable anti-inflammatory effect in the short term. Training too hard and too intensely therefore does not appear to help, and may even be counterproductive.
Those who exercise little or sit a lot make things worse in the opposite direction: more sedentary behaviour is associated with higher IL-6 and CRP, even when exercise minutes are accounted for separately. Prolonged inactivity is linked to an accumulation of inflammatory cells in adipose tissue, which over time contributes to atherosclerosis, muscle loss and other age-related conditions. This is consistent across multiple studies, but the longitudinal analyses from one cohort study were less clear-cut, probably due to insufficient statistical power.
In people with chronic inflammatory rheumatic conditions, the picture is less clear. Biologically it is plausible that exercise helps there too, but the targeted evidence is limited and the optimal dose and intensity for that group have not yet been established. If you have a chronic inflammatory condition, discuss with your doctor or physiotherapist which exercise programme is appropriate for you.
Based on two reviews, three cohort studies or smaller trials not further indexed, and two reviews. No meta-analysis available. The longitudinal analyses in one cohort study were not consistent with the cross-sectional findings.
Does exercise help your immune system as you age?
Regular, moderate exercise helps your immune system by reducing smouldering inflammation. Suddenly training very hard without a gradual build-up can actually temporarily lower your immune defences.
Is moderate exercise good or bad for your immune system?
Moderate exercise (sessions up to 45 minutes) is good for your immune system and is associated with fewer infections. Only prolonged heavy exertion or weeks of overtraining is counterproductive, so that is where the boundary lies.
What does chronic sleep deprivation do to your inflammation in the long run?
Chronic sleep deprivation demonstrably raises inflammatory markers in your blood and is linked to diseases such as cardiovascular disease and dementia; getting enough sleep is therefore one of the most concrete things you can do yourself to limit chronic inflammation.
Does spending more time outdoors help your immune system as you get older?
Spending more time outdoors may support your immune system as you get older, mainly through improved vitamin D production, but whether this actually leads to less illness has not yet been conclusively demonstrated. How polluted the outdoor air is also matters: in areas with serious air pollution, being outside can in fact be detrimental.
Does chronic inflammation accelerate the ageing of your cells?
Chronic inflammation demonstrably accelerates cellular ageing through a negative spiral that is difficult to break. The best evidence-based approach to tackling that spiral is through lifestyle factors that dampen low-grade inflammation, such as sufficient exercise and a diet low in ultra-processed products.
What is the role of chronic inflammation in the development of cancer?
Chronic inflammation is a proven driver of cancer: it promotes every step of tumour formation and makes tumours more resistant to treatment. Controlling persistent inflammation, for example through weight management or treatment of chronic infections, is therefore a relevant strategy for lowering your cancer risk.