Table 1. Changes in cardiorespiratory fitness in response to HIITRS, HIIITTS, and CON.
HIITRS HIITTS CON
Pre Post Pre Post Pre Post
V·O2max (ml·kg-1·min-1) 48.8 ± 2.5 51.9 ± 2.8 46.4 ± 3.0 48.5 ± 3.2 46.6 ± 2.9 47.1 ± 3.2
P-value 0.0004 0.04 0.2
%? 6.4 § 4.6 1.0
V·O2/HR (ml·b-1·min-1) 19.9 ± 2.9 21.4 ± 3.0 18.3 ± 1.6 18.9 ± 1.7 19.7 ± 2.4 19.8 ± 2.2
P-value 0.002 0.03 0.2
%? 7.5 § 3.2 0.6
VT1 (%V·O2max) 69.2 ± 3.0 76.2 ± 2.9 71.2 ± 3.9 75.4 ± 3.9 70.1 ± 3.2 71.0 ± 2.6
P-value 0.0001 0.02 0.1
%? 10.1 § 5.9 1.2
VT2 (%V·O2max) 86.1 ± 5.2 90.8 ± 4.8 81.2 ± 3.6 84.1 ± 3.8 82.2 ± 2.7 83.0 ± 3.0
P-value 0.0002 0.001 0.2
%? 5.4 § 3.6 0.9
Q·max (l·min-1) 23.1 ± 1.8 24.6 ± 2.0 21.5 ± 1.5 22.5 ± 1.7 22.6 ± 1.9 22.6 ± 1.7
P-value 0.0003 0.03 0.8
%? 6.5 § 4.6 0.0
SV (ml·beat-1) 131 ± 10.0 140 ± 10.1 128 ± 7.7 133 ± 9.2 132.9 ± 12.2 135.4 ± 11.8
P-value 0.0001 0.02 0.4
%? 6.8 § 3.9 1.8
Values are means ± SD. V̇O2max, maximum oxygen uptake; V̇O2/HR, O2 pulse; VT1, first ventilatory threshold; VT2, second ventilatory threshold; Q̇max, maximal cardiac output; SV, stroke volume. N = 10 for each group.
† Significantly greater than pre-training value (P < 0.05).
‡ Significantly greater than HIITTS group
§ Significantly greater than CON group.