Table 3.

Post hoc analysis comparing light intensity and moderate intensity microbreaks with sitting. All values are relative to prolonged sitting as the baseline.

Variable	Group comparison												Time comparison
	SIT vs LIT				SIT vs MIT				LIT vs MIT				Baseline vs 2nd hour				2nd hour vs 4th hour				Baseline vs 4th hour
	Δ	95% CI	d	p	Δ	95% CI	d	p	Δ	95% CI	d	p	Δ	95% CI	d	p	Δ	95% CI	d	p	Δ	95% CI	d	p
Vascular function
Carotid artery diameter (cm)	−0.02	−0.06, 0.012	−0.304	0.380	0.00	−0.03, 0.04	0.022	1.000	0.02	−0.01, 0.06	0.327	0.304	0.01	−0.03, 0.05	0.133	1.000	0.01	−0.02, 0.05	0.159	1.000	0.00	−0.03, 0.04	0.026	1.000
Carotid artery velocity (cm/s)	2.58	−5.13, 10.30	0.157	0.858	4.80	−2.95, 12.55	0.292	0.434	2.22	−5.46, 9.89	0.135	0.858	0.88	−6.83, 8.59	0.054	1.000	−0.01	−7.73, 7.70	−0.007	1.000	−0.89	−8.61, 6.82	−0.054	1.000
Carotid artery shear rate (/s)	94.08	−60.38, 248.54	0.286	0.454	60.88	−94.30, 216.05	0.185	0.709	−33.20	−186.85, 120.45	−0.101	0.709	−13.92	−168.29, 140.45	−0.042	1.000	−23.12	−177.58, 131.34	−0.070	1.000	−9.21	−163.67, 145.25	−0.028	1.000
Carotid artery blood flow (ml/min)	−119.25	−399.52, 161.02	−0.200	0.631	111.58	−169.98, 393.14	0.187	0.631	230.83	−47.98, 509.64	0.386	0.156	79.35	−200.76, 359.45	0.133	1.000	68.33	−211.94, 348.59	0.114	1.000	−11.02	−291.29	−0.018	1.000
SFA diameter (cm)	−0.01	−0.06, 0.04	−0.056	0.777	−0.04	−0.09, 0.02	−0.323	0.32	−0.03	−0.08, 0.02	−0.267	0.356	−0.014	−0.064, 0.036	−0.132	1.000	−0.02	−0.067, 0.033	−0.160	1.000	−0.003	−0.05, 0.05	−0.028	1.000
SFA velocity (cm/s)	14.21	−10.20, 38.63	0.273	0.42	15.33	−9.20, 39.86	0.295	0.42	1.12	−23.17, 25.41	0.021	0.912	11.41	−12.99, 35.81	0.219	0.810	10.46	−13.96, 34.87	0.201	0.810	−0.95	−25.37, 23.46	−0.018	0.927
SFA shear rate (/s)	178.83	−108.17, 465.83	0.292	0.284	224.84	−63.49, 513.16	0.368	0.201	46.01	−239.49, 331.51	0.075	0.703	147.52	−139.31, 434.35	0.241	0.676	135.35	−151.65, 422.35	0.221	0.676	−12.17	−299.17, 274.83	−0.020	0.920
SFA blood flow (ml/min)	255.99	−349.93, 861.91	0.198	0.956	153.14	−455.58, 761.85	0.119	1.000	−102.85	−705.61, 499.91	−0.080	1.000	189.47	−416.10, 795.04	0.147	1.000	154.85	−451.07, 760.77	0.120	1.000	−34.62	−640.54, 571.30	−0.027	1.000
Executive function
Reaction time (ms)	−110.6	−173.06, −48.13	−0.831	<0.001∗∗∗	−163.03	−225.78, −100.27	−1.225	<0.001∗∗∗	−52.43	−114.57, 9.71	−0.394	0.048∗	56.36	−6.07, 118.79	0.423	0.068	61.86	0.61, 124.32	0.465	0.061	5.50	−56.96, 67.96	0.041	0.835
Accuracy (%)	−10.04	−16.84, −3.24	−0.693	0.002∗∗	−8.87	−15.70, −2.04	−0.612	0.005∗∗	1.17	−5.60, 7.94	0.081	0.682	4.35	−2.45, 11.15	0.300	0.264	5.89	−0.92, 12.69	0.406	0.127	1.54	−5.26, 8.34	0.106	0.593

Abbreviations: LIT = sitting interrupted by light intensity activity, MIT = sitting interrupted by moderate intensity activity, SIT = uninterrupted sitting, T₀ − T₂ = difference in variables between baseline and the 2nd hour, T₂ − T₄ = difference in variables between the 2nd hour and 4th hour, T₀ − T₄ = difference in variables between baseline and the 4th hour, ‘−’ indicates the decrease with respect to earlier measurements, ‘+’ indicates the increase with respect to earlier measurements, ^Δ = mean change in the values calculated from analysis of variance, ∗p < 0.05, ∗∗p < 0.01.