. 2015 Sep 23;6:260. doi: 10.3389/fphys.2015.00260

Table 1.

Sprint performance, kinetics, and kinematics averaged for sprints 1–4, 5–8, and 9–12.

Variables	Average of sprints			ANOVA p-value (partial eta-squared)
	1–4	5–8	9–12	Condition	Time	Interaction
DISTANCE (M)
SL	23.48±1.33	22.32±1.06	23.32±1.53	<0.001	0.091	0.119
MH	23.31±1.36	22.04±1.32	23.24±1.36	(0.81)	(0.18)	(0.14)
SH	22.92±1.51	21.71±1.27	23.30±1.29
VERTICAL FORCE (BW)
SL	1.67±0.09	1.65±0.09	1.67±0.10	0.003	0.208	0.292
MH	1.67±0.09	1.64±0.08	1.65±0.09	(0.39)	(0.12)	(0.10)
SH	1.66±0.08	1.63±0.09	1.66±0.09
HORIZONTAL FORCE (BW)
SL	0.20±0.04	0.20±0.04	0.20±0.04	0.004	0.013	0.418
MH	0.21±0.04	0.20±0.03	0.20±0.04	(0.37)	(0.31)	(0.07)
SH	0.20±0.04	0.18±0.04	0.20±0.04
RESULTANT FORCES (BW)
SL	1.69±0.09	1.66±0.09	1.68±0.10	0.003	0.178	0.385
MH	1.68±0.09	1.65±0.08	1.67±0.09	(0.38)	(0.13)	(0.08)
SH	1.67±0.08	1.64±0.09	1.68±0.09
CONTACT TIME (S)
SL	0.148±0.010	0.155±0.008^a	0.151±0.011	<0.001	0.015	<0.001
MH	0.148±0.010	0.158±0.009^a	0.150±0.010^ab	(0.82)	(0.30)	(0.36)
SH	0.152±0.010¹ ²	0.163±0.010^a ¹ ²	0.150±0.009^ab
AERIAL TIME (S)
SL	0.095±0.010	0.096±0.011	0.094±0.010	0.026	0.583	0.886
MH	0.093±0.010	0.095±0.009	0.093±0.010	(0.26)	(0.04)	(0.02)
SH	0.094±0.010	0.096±0.011	0.093±0.010
STEP FREQUENCY (HZ)
SL	4.14±0.22	4.01±0.21^a	4.11±0.24^b	<0.001	0.039	0.002
MH	4.17±0.24	3.98±0.22^a	4.14±0.25^b	(0.80)	(0.24)	(0.30)
SH	4.07±0.22¹ ²	3.88±0.17^a ¹	4.14±0.21^b
STEP LENGTH (M)
SL	1.51±0.11	1.48±0.09	1.51±0.12	0.008	0.410	0.987
MH	1.49±0.11	1.47±0.10	1.50±0.11	(0.33)	(0.07)	(0.01)
SH	1.49±0.11	1.47±0.10	1.50±0.11

Mean ± SD (n = 13). The repeated-sprint exercise protocol included a first set of eight sprints performed at sea level (SL), moderate (MH), or severe hypoxia (SH), while the second set of four sprints was always performed at SL.

^{a, b}

Significant different from average of sprint 1–4 and 5–8, respectively (P < 0.05).

^{1, 2}

Significant different from SL and MH, respectively (P < 0.05).