C-reactive protein (CRP) is a marker for inflammation and a risk factor for heart disease. Aerobic exercise does not significantly lower CRP. The aerobic exercise groups did achieve improvements in body weight and aerobic capacity.
The slight improvements in CRP levels were most likely due to reductions in fasting insulin and lower body weight. CRP can be lowered by lowering saturated fat intake, increasing fiber and limiting sugar. Fish oil, aspirin and some antioxidants also appear to lower CRP.