BMC Geriatrics

Table 4 Coefficients of variation for ensemble average waveforms for levels, levels 1– 3 of the trunk stability exercise task.

From: The feasibility of measuring the activation of the trunk muscles in healthy older adults during trunk stability exercises

		Abdominal Muscles			Back Extensor Muscles
		Right	Left		Right	Left
Level 1	LRA	0.50	0.41	L1–3	0.43	0.40
	URA	0.67	0.53	L1–6	0.39	0.45
	EO1	0.72	0.42	L3-3	0.33	0.37
	EO2	0.57	0.61	L3–6	0.42	0.37
	EO3	0.48	0.47	L4–8	0.33	0.52
	IO	0.68	0.49	L5-2	0.45	0.41
Level 2	LRA	0.49	0.40	L1–3	0.39	0.36
	URA	0.59	0.53	L1–6	0.33	0.44
	EO1	0.60	0.49	L3-3	0.38	0.48
	EO2	0.56	0.59	L3–6	0.48	0.47
	EO3	0.43	0.44	L4–8	0.35	0.51
	IO	0.68	0.46	L5-2	0.45	0.39
Level 3	LRA	0.56	0.48	L1–3	0.45	0.42
	URA	0.61	0.60	L1–6	0.38	0.50
	EO1	0.51	0.52	L3-3	0.38	0.52
	EO2	0.50	0.69	L3–6	0.44	0.47
	EO3	0.39	0.55	L4–8	0.39	0.52
	IO	0.59	0.44	L5-2	0.48	0.44

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