Table 3. Concentration of pro- and anti-inflammatory cytokines in three groups of subjects. Data are means (±SD).
Variables TTR (C) Group 1 TTR (D) Group 2 CON Group 3
Hepcidin (ng. ml -1) nd 72.0 (15.0) 3†  29.9 (7.5) 2† 
CK (U. l-1) 248.0 (221.0) 201.2 (106.4) 3* 108.6 (47.2) 2*
IL-1β (pg. ml-1) 3.0 (2.5) 3# 3.0 (1.1) 3†  .4 (.5) 1#,2† 
IL- 6 (pg. ml-1) 1.3 (.5) 3* 1.0 (.4) .9 (.5) 1
IL -10 (pg. ml-1) 9.3 (.9) 3†  2.9 (1.5) 3†  .9 (.2) 1† ,2† 
TTR(C) – tennis trained group in period March 2010; TTR(D) – tennis trained group in period September 2010; CON – control group in September 2010. Superscript*, superscript# and superscript†  denote p < 0.05, 0.01 and 0.001 respectively between the groups.