Table 2. Swimming force, dry land strength, swimming performance times, maximal velocity, stroke length and stroke rate. All data are presented as mean (standard deviation). Intervention group Control group All (n = 11) Female (n = 5) All (n = 9) Female (n = 7) FS (N) Pre 124.9 (23.2) 109.8 (6.9) 114.4 (17.3) 107.0 (4.7) Post 133.5 (21.9)**†  117.8 (6.7)*†  118.1 (18.3)†  109.3 (3.4)†  FL (N) Pre 318.8 (89.8) 260.0 (32.9) 277.9 (44.2) 262.8 (36.7) Post 383.5 (89.3)**†  323.7 (32.0)* 310.7 (56.2)*†  287.3 (33.8)* 50m (s) Pre 28.88 (2.00) 30.51 (1.43) 29.35 (1.72) 29.87 (1.48) Post 28.55 (1.80) 29.93 (1.40) 29.16 (1.76) 29.83 (1.35) 100m (s) Pre 63.00 (4.12) 66.52 (2.95) 64.08 (4.18) 65.43 (3.50) Post 62.05 (3.82) 64.75 (3.42) 64.06 (4.80) 65.78 (3.87) 400m (s) Pre 290.43 (16.26) 301.83 (15.02) 290.08 (16.20) 294.70 (14.88) Post 286.43 (16.64)* 298.09 (17.56) 290.40 (18.24) 296.62 (15.50) vmax (m·s-1) Pre 1.59 (.11)10 1.50 (.09) 1.53 (.08)7 1.50 (.06)5 Post 1.60 (.10)10 1.53 (.06) 1.56 (.07)7 1.53 (.03)5 SL (m) Pre 1.68 (.17)10 1.61 (.11)†  1.74 (.13)7 1.78 (.10)5†  Post 1.73 (.16)10 1.65 (.14) 1.80 (.15)7 1.80 (.18)5 SR (Hz) Pre .953 (.090)10 .936 (.086)†  .885 (.078)7 .846 (.036)5†  Post .930 (.074)10 .929 (.074) .872 (.078)7 .858 (.090)5 F: Maximal swimming force, N: Newton, F: 1RM land strength, 50m: 50m maximal front crawl swimming, m: meters, s: seconds, 100m: 100m maximal front crawl swimming, 400m: 400m maximal front crawl swimming, : Maximal swimming velocity, : Include 10 subjects, : Include 7 subjects, : Include 5 subjects, SL: Stroke length, SR: Stroke rate, rpm: repetitions per minute (in this context stroke-cycles per minute). * Significant change in group at p < 0.05. ** Significant change in group at p < 0.01. †  Significant difference between intervention group and control group at p < 0.05.