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.