Table 2.

Baseline, follow-up, and between-group differences at follow-up and within-group effect size for the mechanical and the EMG parameters of the loading and unloading perturbation and preactivation EMG measured immediately before each perturbation. Values are means (95% confidence interval). All values are adjusted for baseline value.

		WORK						HOME						Differences at follow-up
		0 weeks		10 weeks		P	Effect size	0 weeks		10 weeks		P	Effect size	Mean	95% CI	P
		Mean	95% CI	Mean	95% CI			Mean	95% CI	Mean	95% CI
Load	Stopping time (ms)	362	(358–366)	352	(347–357)	<0.01	−0.23	360	(355–365)	351	(346–356)	<0.01	−0.21	1.2	(−6–8.4)	0.84
	Stopping distance (mm)	178	(174–181)	167	(164–171)	<0.01	−0.32	178	(175–182)	166	(162–170)	<0.01	−0.38	1.5	(−0.7–3.9)	0.52
	EMG onset latency (ms)	94	(90–98)	88	(83–93)	0.09	−0.12	95	(90–99)	95	(89–101)	0.90	0.01	−6.8	(−14.6–0.9)	0.22
	EMG peak (% of max)	81	(75–86)	83	(77–89)	0.51	0.07	81	(75–87)	89	(82–97)	0.08	0.22	−5.9	(−15.7–3.8)	0.37
Unload	Stopping time (ms)	371	(363–379)	358	(350–367)	0.02	−0.12	374	(365–383)	351	(342–361)	<0.01	−0.23	7.0	(−6.1–20.2)	0.18
	Stopping distance (mm)	263	(256–270)	258	(250–266)	0.27	−0.06	265	(257–273)	258	(250–267)	0.16	−0.09	−0.1	(−1.2–1.1)	0.75
	EMG shut-off (ms)	97	(77–116.5)	72	(47.9–96.5)	0.13	−1.42	93	(70.6–115.7)	79	(51–107)	0.44	−0.83	−6.6	(−43.8–30.6)	0.68
	EMG peak (% of max)	50	(48–53)	46	(43–50)	0.04	−0.14	51	(47–54)	47	(43–52)	0.17	−0.11	−1.1	(−6.4–4.3)	0.79
	EMG unload (%)	6.6	(6-7)	6.1	(5–7)	0.25	−0.11	6.6	(6-7)	7.5	(7-8)	0.08	0.20	−1.4	(−2.6–−0.2)	0.04
Pre	EMG preactivation (% of max)	9.1	(8.5–9.6)	8.1	(7.5–8.8)	0.02	−0.16	9.0	(8.4–9.7)	9.8	(9.1–10.6)	0.07	0.13	−1.7	(−2.7–−0.7)	<0.01

HOME: home-based physical exercise, WORK: work-based physical exercise. Negative effect sizes denote a within-group decrease from baseline to follow-up.