Does exercise reduce chronic inflammation?

How much exercise, and what type, works best to lower inflammation?

Moderate aerobic exercise—like brisk walking, swimming, or cycling—is the most studied and effective type for reducing chronic inflammation. A 2025 meta-analysis of 10 clinical trials in older adults found that aerobic training at 60–80% of maximum heart rate, for 30–60 minutes per session, 2–3 times per week, significantly lowered three key inflammatory markers: CRP dropped by about 15%, interleukin-6 (IL-6) by about 14%, and TNF-α by about 12% [1]. The same analysis also showed that the anti-inflammatory cytokine IL-10 increased by about 50% [1].

Even lower-intensity exercise helps. A 2024 randomized trial of 102 older adults with cognitive frailty found that 24 weeks of Baduanjin (a slow, meditative movement practice) reduced the pro-oxidative marker MDA by about 1.1 nmol/mL and increased the antioxidant enzyme SOD by about 10 U/mL, while also boosting anti-inflammatory cytokines like IFN-γ and IL-2 [2]. This suggests that even gentle, consistent exercise can shift the body toward an anti-inflammatory state.

For people with chronic conditions, the dose matters. A 2023 longitudinal study of over 1,200 adults (some with type 1 diabetes) found that any moderate-to-vigorous physical activity (MVPA) was linked to 11% lower levels of the inflammatory marker PAI-1, and meeting the guideline of 150+ minutes per week was associated with a 17% drop in PAI-1 in those with diabetes [8]. In a large 2024 analysis of NHANES data, the greatest reduction in depression risk—which is tied to inflammation—occurred at 1,200–1,722 MET-minutes per week (roughly 150–200 minutes of brisk walking) [6].

Does higher-intensity exercise work better than lower-intensity?

For most people, moderate intensity is enough to reduce inflammation, and very high intensity may not add extra benefit—and could even be counterproductive in some cases. A 2021 systematic review and meta-analysis of 27 studies found that, overall, higher-intensity exercise did not lower IL-6, TNF-α, or IL-10 more than lower-intensity exercise [7]. However, for CRP specifically, higher-intensity training was more effective in middle-aged adults and in programs lasting longer than 9 weeks, producing an additional 0.5 mg/L drop in CRP compared to lower-intensity [7].

A 2024 study of pregnant women found an interesting U-shaped pattern: women who did moderate physical activity had 10% lower CRP than those who did low activity, but women who did high activity actually had 14% higher CRP than the moderate group [3]. This suggests that for some populations, moderate exercise hits the sweet spot for inflammation reduction.

Even a single session of intense eccentric exercise (like plyometric jumps) temporarily spikes inflammatory markers—IL-6, IL-10, and TNF-α all rose immediately after exercise in a 2025 study of 12 active men [4]. But this acute response is normal and temporary; the chronic anti-inflammatory benefit comes from regular training, not from pushing to exhaustion every time.

Who benefits most from exercise for inflammation, and are there any limits?

Older adults and people with chronic inflammatory conditions seem to benefit the most. The 2025 meta-analysis focused on adults over 60 and found significant reductions in CRP, IL-6, and TNF-α with aerobic exercise [1]. People with chronic kidney disease (CKD) also saw benefits: a 2021 study of 84 CKD patients found that 12 weeks of aerobic training reduced plasma myostatin (a muscle-wasting factor linked to inflammation) by about 20%, though systemic inflammation (CRP, IL-6) did not drop significantly in this group [5]. This suggests that exercise may help counteract some inflammatory damage even when it doesn't lower all blood markers.

Exercise also helps reduce inflammation in specific high-risk groups. A 2021 randomized trial in childhood cancer survivors found that a structured exercise program significantly lowered the systemic immune-inflammation index (SII), a composite marker of inflammation, compared to a control group [11]. In smokers, a 2026 study showed that moderate-intensity swimming reduced salivary IL-8 and TNF-α, indicating lower airway inflammation [9].

However, exercise is not a magic bullet for everyone. In the CKD study, 12 weeks of exercise did not reduce systemic CRP or IL-6 levels, even though it improved muscle function [5]. And in a 2021 study of over 2,500 men aged 40–79, higher inflammatory markers (hs-CRP, white blood cell count) were linked to lower physical activity and slower gait speed, but exercise did not prevent the development of sarcopenia (muscle loss) over 4 years [10]. This means exercise is a powerful tool for reducing inflammation, but it works best as part of a broader strategy that includes diet, sleep, and medical care.

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