From: The effects of long-term endurance training on the immune and endocrine systems of elderly men: the role of cytokines and anabolic hormones
Cytokines
Elderly runners
Sedentary controls
IL-2
90.1 ± 3.4
101.9 ± 5.7
IL-3
3.8 ± 1.9
15.2 ± 4.7*
IL-4
3.4 ± 3.4
Not detectable
IL-6
0.6 ± 0.3
3.7 ± 0.9**
IL-10
0.06 ± 0.04
1.73 ± 0.69
IL-12
11.5 ± 1.5
20.5 ± 2.5**