Table 2. Adaptive changes in motor abilities over the training period.
Interval jumping Interval running
Pre Post Pre Post
PPO (W) 749.8 ± 43.1 805.1 ± 51.7 800.8 ± 49.0 854.9 ± 55.9
 P-value
  %?
 ES
 CV of mean %?		 0.002 ‡
7.3
1.1
21%		 0.003 ‡
6.7
1.0
20%
APO (W) 490.9 ± 49.5 524.9 ± 51.5 482.8 ± 43.1 513.0 ± 47.8
 P-value
  %?
 ES
 CV of mean %?		 0.001 ‡
6.9
0.7
21%		 0.006 ‡
6.2
0.6
22%
20-m sprint (s) 3.38 ± 0.06 3.34 ± 0.11 3.39 ± 0.12 3.22 ± 0.15
 P-value
  %?
 ES
 CV in mean %?		 0.08
–1.9
0.4
92%		 0.001 ‡
–5.2 §
1.2
18%
COD (s) 7.95 ± 0.25 7.74 ± 0.24 7.89 ± 0.24 7.69 ± 0.25
 P-value
  %?
 ES
 CV of mean %?		 0.004 ‡
–2.7
1.19
31%		 0.004 ‡
–2.6
1.17
33%
SJ (cm) 37.5 ± 1.5 40.3 ± 1.4 37.4 ± 1.7 38.7 ± 1.8
 P-value
  %?
 ES
 CV of mean %?		 0.008 ‡
7.4 ‡
1.2
16%		 0.01 ‡
3.4
0.7
57%
CMJ (cm) 43.0 ± 1.5 45.9 ± 1.6 43.2 ± 1.7 44.7 ± 1.9
 P-value
  %?
 ES
 CV of mean %?		 0.004 ‡
6.7 ‡
1.8
15%		 0.002 ‡
3.5
0.8
53%
Values are means ± SD; %Δ, within group changes from pre- to post-training; ES, effect size. PPO, peak power
output; APO, average power output; COD, change of direction; SJ, squat jump; CMJ, countermovement jump.
N = 10 for each group. ‡ Significantly greater than pre-training value (P < 0.05); § Significantly greater changes
than the interval jumping group (P < 0.05).‡ Significantly greater changes than the interval running group (P < 0.05).