Table 1. Adaptive changes in cardiorespiratory fitness over the training period.
Interval jumping Interval running
Pre Post Pre Post
V·O2max (ml·kg–1·min–1) 46.7 ± 2.9 49.2 ± 3.3 47.6 ± 2.5 50.4 ± 2.9
 P-value
  %?
 ES
 CV of mean %?		 0.001 ‡
5.3
0.8
44%		 0.0001 ‡
5.9
1.0
20%
vV·O2max (km·h–1) 13.3 ± 0.8 14.1 ± 0.6 13.5 ± 0.9 14.5 ± 0.6
 P-value
  %?
 ES
 CV of mean %?		 0.001 ‡
6.0
1.1
68%		 0.0001 ‡
7.4
1.3
44%
VT1 (%V·O2max) 70.6 ± 2.5 74.1 ± 3.4 70.5 ± 2.1 74.4 ± 2.0
 P-value
  %?
 ES
 CV of mean %?		 0.005 ‡
4.9
1.1
38%		 0.002 ‡
5.5
1.9
19%
VT2 (%V·O2max) 83.2 ± 2.9 86.9 ± 3.2 84.0 ± 3.1 88.6 ± 3.3
 P-value
  %?
 ES
 CV of mean %?		 0.002 ‡
4.4
1.2
37%		 0.001 ‡
5.4
1.4
19%
Q·max (l·min–1) 29.0 ± 1.6 30.5 ± 2.1 28.7 ± 1.9 30.4 ± 1.9
 P-value
  %?
 ES
 CV of mean %?		 0.001 ‡
5.1
0.8
42%		 0.0001 ‡
5.9
0.9
19
SVmax (ml·b–1) 149.2 ± 8.5 157.0 ± 11.3 154.8 ± 8.5 163.2 ± 8.9
 P-value
  %?
 ES
 CV of mean %?		 0.006 ‡
5.2
0.7
44%		 0.0002 ‡
5.4
0.9
18%
Values are means ± SD; %Δ, within group changes from pre- to post-training; ES, effect size. V̇O2max, maximum
oxygen uptake; vV̇O2max, velocity associated with V̇O2max; VT1, first ventilatory threshold; VT2, second ventilatory
threshold; Q̇max, maximal cardiac output; SVmax, stroke volume. N = 12 for each group.‡ Significantly greater than pre-training value (P < 0.05).