Table 1. Physiological, anthropometric, and motor performance data.
| Initial test (9/2016) | Test wave 2 (3/2017) | Test wave 3 (9/2017) | Test wave 4 (3/2018) | Test wave 5 (9/2018) | |
|---|---|---|---|---|---|
| Swimming group (n = 10) | |||||
| Age (months) | 145.8 ± 7.2 | 151.8 ± 7.2 | 157.8 ± 7.2 | 163.8 ± 7.2 | 169.8 ± 7.2 |
| Hemoglobin concentration (gr/l) | 128.5 ± 11.1 | 129.8 ± 12.5 # | 132.3 ± 8.3 | * 137.2 ± 8.7 ### | * 138.1 ± 11.0 |
| Vital capacity (ml) | 3796 ± 645 ### | ** 4200 ± 857 ## | ** 4486 ± 1064 ## | *** 4823 ± 1081 ## | *** 4911 ± 11.30 ## |
| Heart rate at rest (bpm) | 61.9 ± 7.0 | 63.8 ± 7.5 | 61.7 ± 7.3 ## | 62.6 ± 4.7 ### | 61.7 ± 5.9 ## |
| Body height (cm) | 165.1 ± 9.4 ## | *** 168.5 ± 10.6 ## | *** 171.9 ± 10.7 # | *** 175.4 ± 10.2 # | *** 177.9 ± 9.5 # |
| Body weight (kg) | 57.2 ± 14.3 ## | 57.9 ± 13.2 ## | 58.9 ± 14.6 # | 62.4 ± 15.0 # | 63.7 ± 14.2 # |
| Chest girth (cm) | 81.0 ± 7.5 ## | ** 83.7 ± 7.3 ## | ** 83.9 ± 8.0 # | *** 86.4 ± 8.9 ## | *** 87.5 ± 8.2 ## |
| Dynamic back strength (kg) | 68.6 ± 10.1 | * 74.7 ± 15.3 | ** 79.6 ± 17.3 | ** 89.8 ± 21.7 | ** 90.3 ± 19.8 |
| Eye-hand reaction time (ms) | 210 ± 27 | 199 ± 18 | 197 ± 19 # | 222 ± 26 | 200 ± 23 |
| Racket sports group (n = 11) | |||||
| Age (months) | 145.6 ± 8.0 | 151.6 ± 8.0 | 157.6 ± 8.0 | 163.6 ± 8.0 | 169.6 ± 8.0 |
| Hemoglobin concentration (gr/l) | 119.7 ± 12.7 | 117.1 ± 9.7 # | 122.3 ± 17.1 | 119.6 ± 10.4 ### | ** 132.8 ± 14.5 |
| Vital capacity (ml) | 2686 ± 335 ### | ** 2946 ± 399 ## | *** 3059 ± 478 ## | *** 3345 ± 414 ## | *** 3432 ± 477 ## |
| Heart rate at rest (bpm) | 70.5 ± 10.1 | 68.1 ± 5.7 | 71.2 ± 6.4 ## | 70.4 ± 3.8 ### | 69.4 ± 4.0 ## |
| Body height (cm) | 154.9 ± 8.7 ## | *** 157.7 ± 9.1 ## | *** 161.4 ± 9.6 # | *** 165.1 ± 9.4 # | *** 169.0 ± 8.9 # |
| Body weight (kg) | 42.4 ± 9.1 ## | ** 46.3 ± 9.2 ## | ** 47.5 ± 9.7 # | *** 51.1 ± 9.0 # | *** 53.2 ± 9.2 # |
| Chest girth (cm) | 71.7 ± 7.6 ## | ** 73.9 ± 8.0 ## | *** 76.0 ± 7.1 # | *** 78.1 ± 6.6 ## | *** 79.8 ± 6.7 ## |
| Dynamic back strength (kg) | 57.1 ± 17.0 | ** 67.9 ± 19.3 | *** 71.1 ± 14.0 | *** 77.2 ± 18.6 | *** 85.2 ± 17.3 |
| Eye-hand reaction time (ms) | 223 ± 34 | 213 ± 32 | 219 ± 21 # | 229 ± 17 | 223 ± 32 |
Values are means and standard deviations (M ± SD). Significance of differences within the two sports groups between initial and following values
*p < 0.05
**p < 0.01
***p < 0.001.
Significance of differences between the swimming and racket sports groups
#p < 0.05
##p < 0.01
###p < 0.01.