TABLE 3.

Data from pre‐ and posttests of maximal accumulated oxygen deficit.

	HIIT 4 × 4 min (n = 10)		SIT 8 × 20 s (n = 12)		SIT 10 × 30 s (n = 9)
	Pre	Post	Pre	Post	Pre	Post
MAOD
L	6.10 ± 0.59	6.11 ± 0.65	6.26 ± 1.41	7.02 ± 1.67** c	7.07 ± 1.95	6.70 ± 1.42
ml kg−1	83.6 ± 8.2	81.8 ± 6.0	83.2 ± 11.9	92.7 ± 16.8* c	88.0 ± 18.0	83.1 ± 12.9
L (curvilinear)	6.91 ± 0.68	6.89 ± 0.69	6.83 ± 1.28	7.78 ± 1.56** c	8.07 ± 2.17	7.83 ± 1.46
ml kg−1 (curvilinear)	93.5 ± 8.9	92.1 ± 3.7	91.3 ± 12.4	103.3 ± 17.8* c	98.9 ± 20.3	97.0 ± 17.0
Velocity % MAS	121 ± 10	117 ± 5	120 ± 7	123 ± 8c	120 ± 8	126 ± 9* cc
Velocity (km h−1)	16.2 ± 1.3	17.3 ± 1.4***	16.1 ± 1.3	17.3 ± 1.3**	16.2 ± 1.4	17.4 ± 1.5***
Time (s)	162 ± 37	145 ± 18	153 ± 34	150 ± 21	164 ± 21	142 ± 12*
V̇O2 response
Rate (ml kg−1 s−1)	0.70 ± 0.07	0.77 ± 0.09* b	0.75 ± 0.10	0.77 ± 0.10	0.69 ± 0.09	0.79 ± 0.12** b
Sec 90% V̇O2peak	95 ± 11	92 ± 8	92 ± 12	88 ± 9	96 ± 11	85 ± 10*
Sec pre‐90% V̇O2peak		86 ± 8*		89 ± 12		83 ± 13** b

Note: Data are presented as mean ± SD. 4 × 4 min, 4 × 4 min running at ~95% of maximal aerobic speed (MAS) interspersed by 3 min active recovery; 8 × 20 s, 8 × 20 s exhaustive running at ~150% of MAS interspersed by 10 s passive recovery; 10 × 30 s, 10 × 30 s maximal running (average of ~175% MAS) interspersed by 3.5 min active recovery; MAOD, maximal accumulated oxygen deficit; curvilinear, calculation based on a curvilinear relationship between velocity and oxygen uptake; V̇O_2peak, peak oxygen uptake; MAS, maximal aerobic speed; Rate, maximum rate of increase in V̇O₂ during 60 continuous seconds; Sec 90% V̇O_2peak, seconds to reach 90% of V̇O_2peak. Significant different change from pre‐ to posttest; within group (*p ≤ 0.05, **p ≤ 0.01, ***p ≤ 0.001), compared to 8 × 20 s (^b p ≤ 0.05), compared to 4 × 4 min (^c p ≤ 0.05, ^cc p ≤ 0.01).