Table 2.

Percent differences between younger and older adults (mean ± standard error)

	Younger	Older	Reactance (X)		Resistance (R)		Phase (P)
	Numbe r	Numbe r	% Diff	p value	% Diff	p value	% Diff	p values
Mean Total Body	38	41	−13 ± 4	0.01	−12 ± 6	0.09	−2 ± 8	0.84
Mean Upper Extremity	16	24	−9 ± 5	0.10	5 ± 9	0.55	−11 ± 10	0.32
Deltoid	16	24	−7 ± 8	0.44	−0 ± 8	0.97	−6 ± 14	0.70
Biceps brachii	16	24	−8 ± 6	0.20	10 ± 12	0.41	−14 ±	0.39
Brachioradialis	16	24	−5 ± 6	0.46	7 ± 11	0.48	−7 ± 11	0.59
Triceps brachii	16	24	−20 ± 5	0.01	−3 ± 13	0.83	−15 ±	0.24
Forearm	16	24	−7 ± 6	0.28	−5 ± 8	0.58	−1 ± 10	0.95
Forearm flexors	16	24	−18 ± 5	2E-03	11 ± 12	0.35	−22 ± 9	0.05
Extensor indicis	16	24	−12 ± 6	0.06	−0 ± 6	0.95	−9 ± 8	0.25
Mean Lower Extremity	22	17	−23 ± 6	1E-03	−27 ± 7	0.01	3 ± 12	0.79
Tensor fascia	22	17	−33 ± 5	8E-06	−20 ± 8	0.03	−16 ± 9	0.12
Biceps femoris	22	17	−16 ± 8	0.05	−35 ± 6	5E-04	18 ± 19	0.32
Vastus lateralis	22	17	−15 ± 8	0.10	−32 ± 9	0.01	24 ± 22	0.24
Vastus medialis	22	17	−21 ± 7	0.01	−22 ± 8	0.03	0 ± 13	0.97
Tibialis anterior	22	17	−20 ± 7	0.01	−32 ± 7	3E-03	13 ± 14	0.30
Medial gastroc.	22	17	−24 ± 7	2E-03	−29 ± 9	0.02	−5 ± 14	0.76
Extensor	22	17	−30 ± 9	4E-03	−34 ± 6	2E-04	−2 ± 12	0.88

Significant differences shown in bold.