Table 1. Pre-training vs. post-training values for physiological parameters in different HIIT groups. Values are means ± SD.
Group
HIITASR HIITvIFT HIITMAS
V̇O2max (mL·kg-1·min-1) Pre
Post
p and Cohen’s (d)
51.0 ± 2.2
54.7 ± 2.4 † 
0.001 (d = 1.6)
51.6 ± 2.8
55.0 ± 3.0 † 
0.001 (d = 1.2)
51.4 ± 2.0
54.2 ± 2.4 † 
0.004 (d = 1.1)
V̇O2max (L·min-1) Pre
Post
p and Cohen’s (d)
3.95 ± 0.24
4.24 ± 0.27 † 
0.001 (d = 1.5)
4.06 ± 0.16
4.32 ± 0.17 † 
0.005 (d = 1.1)
4.15 ± 0.33
4.39 ± 0.37 † 
0.001 (d = 0.7)
V̇O2/HR (mL·b-1·min-1) Pre
Post
p and Cohen’s (d)
21.6 ± 1.6
23.2 ± 1.6 † 
0.002 (d = 1.4)
21.7 ± 0.9
23.1 ± 1.0 † 
0.004 (d = 1.1)
22.2 ± 1.9
23.5 ± 2.0 † 
0.005 (d = 0.6)
E (L·min-1) Pre
Post
p and Cohen’s (d)
191.7 ± 14.1
214.4 ± 14.6 † 
0.003 (d = 1.6)
199.5 ± 19.7
225.3 ± 24.5 † 
0.002 (d = 1.1)
195.8 ± 19.3
220.9 ± 25.3 † 
0.006 (d = 1.1)
VT1 (%V̇O2max) Pre
Post
p and Cohen’s (d)
71.8 ± 6.5
76.7 ± 7.0 † 
0.005 (d = 0.7)
73.2 ± 5.1
78.0 ± 5.9 † 
0.001 (d = 0.8)
74.2 ± 7.0
79.2 ± 5.9 † 
0.003 (d = 0.7)
VT2 (%V̇O2max) Pre
Post
p and Cohen’s (d)
85.0 ± 5.8
89.1 ± 6.3 † 
0.002 (d = 1.1)
87.3 ± 4.2
91.9 ± 4.1 † 
0.006 (d = 1.1)
87.8 ± 3.1
91.5 ± 3.2 † 
0.001 (d = 0.8)
Q̇max (L·min-1) Pre
Post
p and Cohen’s (d)
24.4 ± 1.5
26.1 ± 1.7 † 
0.005 (d = 1.5)
25.0 ± 1.0
26.6 ± 1.1 † 
0.001 (d = 1.0)
25.6 ± 2.0
27.1 ± 2.3 † 
0.001 (d = 0.7)
SVmax (mL·b-1) Pre
Post
p and Cohen’s (d)
133.4 ± 10.2
143.1 ± 10.2 † 
0.002 (d = 0.9)
134.1 ± 15.4
142.5 ± 16.3 † 
0.004 (d = 0.7)
137.1 ± 11.8
144.7 ± 12.5 † 
0.005 (d = 0.5)
MAS (km·h-1) Pre
Post
p and Cohen’s (d)
13.6 ± 0.5
14.6 ± 0.4 † 
0.002 (d = 2.2)
13.6 ± 0.6
14.7 ± 0.7 † 
0.001 (d = 1.6)
13.7 ± 0.7
14.6 ± 0.8 † 
0.002 (d = 1.2)
MSS (km·h-1) Pre
Post
p and Cohen’s (d)
31.3 ± 1.2
31.5 ± 1.3
0.57 (d = 0.1)
30.8 ± 1.6
31.0 ± 1.3
0.44 (d = 0.1)
30.8 ± 1.4
31.1 ± 1.3
0.14 (d = 0.2)
ASR (km·h-1) Pre
Post
p and Cohen’s (d)
17.7 ± 1.2
16.8 ± 1.4 † 
0.006 (d = 0.7)
17.2 ± 1.7
16.2 ± 1.8 † 
0.001 (d = 0.6)
17.1 ± 1.7
16.6 ± 1.6 † 
0.05 (d = 0.4)
V̇O2max, maximum oxygen uptake; V̇O2/HR, O2 pulse; V̇E, ventilation; VT1, first ventilatory threshold; VT2, second ventilatory threshold; Q̇, cardiac output; SV, stroke volume; MAS, maximal aerobic speed; MSS, maximal sprint speed; ASR, anaerobic speed reserve. N, 10 for each group. †  Significantly greater compared to baseline value (p < 0.05).