Table 3.
Laboratory test results at the beginning (Pre) and the end (Post) of the training period.
| INT (n = 13) | VOL (n = 17) | Effect Size | |||
|---|---|---|---|---|---|
| Pre | Post | Pre | Post | INT vs. VOL (Δ% Pre-Post) |
|
| Endurance Performance | |||||
| vLT1 (km/h) | 10.2 ± 1.3 | 10.7 ± 1.2 ** | 10.1 ± 1.3 | 10.9 ± 1.1 *** | −0.65 (moderate) |
| vLT2 (km/h) | 12.7 ± 1.5 | 13.1 ± 1.4 ** | 12.5 ± 1.6 | 13.0 ± 1.5 *** | −0.19 (trivial) |
| vMax (km/h) | 15.7 ± 1.4 | 16.2 ± 1.4 *** | 15.5 ± 1.7 | 15.8 ± 1.8 ** | 0.50 (moderate) |
| Serum hormone concentrations | |||||
| Cor M (nmol/L) | 343 ± 97 | 356 ± 90 | 363 ± 85 | 346 ± 110 | 0.27 (small) |
| fTesto M (pmol/L) | 40 ± 25 | 36 ± 22 | 30 ± 21 | 28 ± 22 | −0.03 (trivial) |
| fTesto:Cor | 0.11 ± 0.06 | 0.10 ± 0.05 | 0.10 ± 0.05 | 0.09 ± 0.08 | −0.39 (small) |
Values are presented as means ± SD. vLT1, the speed at the first lactate threshold; vLT2, the speed at the second lactate threshold; vMax, maximal speed of the incremental treadmill test; Cor, serum cortisol; fTesto, serum free testosterone; fTesto:Cor, the ratio between serum free testosterone and cortisol; INT, Intensity-group; VOL, Volume-group. *** p < 0.001, ** p < 0.01, different compared to the pre, ES = Effect size as Cohen’s D.