TABLE 1.

Blood nitrite concentration and Doppler Ultrasound exam outcomes of the femoral artery before and after treatments.

		PLA30 min	PBMT30 min	PLA6 h	PBMT6 h	ANOVA
						Main Effect: Time	Main Effect: Condition	Interaction: Time × condition
Nitrite (nmol/mg of protein)	Before	0.38 ± 0.23 (0.23 to 0.53)	0.39 ± 0.31 (0.19 to 0.59)	0.33 ± 0.25 (0.17 to 0.49)	0.30 ± 0.18 (0.18 to 0.41)	p = 0.90 $n_{\text{p}}^2$ < 0.01	p = 0.55 $n_{\text{p}}^2$ = 0.04	p = 0.48 $n_{\text{p}}^2$ = 0.07
	After	0.34 ± 0.18 (0.22 to 0.46)	0.37 ± 0.33 (0.16 to 0.59)	0.33 ± 0.21 (0.20 to 0.47)	0.34 ± 0.20 (0.22 to 0.47)
	Δ%	7.48 ± 58.75 (−29.84 to 44.81)	−7.64 ± 20.63 (−20.76 to 5.46)	28.25 ± 110.20 (−41.76 to 98.27)	32.54 ± 89.21 (−24.14 to 89.22)		p = 0.57 $n_{\text{p}}^2$ = 0.06
Doppler ultrasonography
Peak Systolic Velocity F.a (cm/s)	Before	65.05 ± 9.67 (59.20 to 70.90)	61.20 ± 11.31 (54.36 to 68.03)	74.86 ± 15.63 (65.41 to 84.31)	68.40 ± 18.85 (57.01 to 79.80)	p = 0.32 $n_{\text{p}}^2$ = 0.08	p = 0.02* $n_{\text{p}}^2$ = 0.25 (post hoc P ≥ 0.08)	p = 0.97 $n_{\text{p}}^2$ < 0.01
	After	60.33 ± 13.37 (52.25 to 68.42)	58.90 ± 17.81 (48.14 to 69.67)	70.89 ± 21.73 (57.75 to 84.02)	65.82 ± 18.06 (54.90 to 76.74)
	Δ%	−7.20 ± 15.83 (−16.76 to 2.36)	−1.35 ± 32.18 (−20.80 to 18.09)	−2.50 ± 33.76 (−22.90 to 17.90)	−2.78 ± 41.36 (−22.21 to 27.78)		p = 0.82 $n_{\text{p}}^2$ = 0.09
Pulsatility Index F.a (a.u.)	Before	11.08 ± 5.84 (7.55 to 14.61)	10.17 ± 4.83 (7.25 to 13.09)	9.53 ± 4.89 (6.57 to 12.49)	9.99 ± 3.23 (8.03 to 11.94)	p = 0.21 $n_{\text{p}}^2$ = 0.12	p = 0.85 $n_{\text{p}}^2$ = 0.02	p = 0.83 $n_{\text{p}}^2$ = 0.01
	After	12.10 ± 4.98 (9.08 to 15.11)	11.64 ± 5.31 (8.42 to 14.85)	11.03 ± 7.20 (6.67 to 15.38)	12.27 ± 7.69 (7.62 to 16.90)
	Δ%	19.47 ± 43.02 (−6.52 to 45.46)	27.73 ± 72.87 (−16.66 to 71.41)	17.44 ± 50.37 (−13.00 to 47.88)	36.26 ± 84.07 (−14.54 to 87.07)		p = 0.82 $n_{\text{p}}^2$ = 0.02

Values are expressed as mean ± SD (CI95%).

* = main condition effect; $n_{\text{p}}^2$, partial eta squared; F.a., femoral artery; PBMT_{30 min}, photobiomodulation treatment 30 min before exercise; PLA_{30 min} = placebo treatment 30 min before exercise; PBMT_{6 h} = photobiomodulation treatment 6 h before exercise; PLA_{6 h} = placebo treatment 6 h before exercise n = 13.