Reliability and effects of muscular pretension on isometric strength of older adults

Morat, Tobias; Preuß, Peter

doi:10.1007/s11556-013-0131-y

European Review of Aging and Physical Activity

Table 2 Reliability statistics for strength measures (maximum torque (MT [N m]) and maximum rate of torque development (MRTD [N m s⁻¹]), n = 35) obtained for knee extension and flexion during the two trials at the same session (tr1, tr2) and the two test sessions (s1, s2)

From: Reliability and effects of muscular pretension on isometric strength of older adults

			Extension							Flexion
Comparison	Variable	PT	MD [%]	CV [%]	SMD	SEM	ICC^◊	d	r_s ^◊	MD [%]	CV [%]	SMD	SEM	ICC^◊	d	r_s ^◊
s1: tr1–tr2	MT [N m]	10	2.30	3.30	0.06	0.09	0.99	0.06	0.99	6.30	7.90	0.11	0.14	0.98	0.09	0.98
		20	2.90	5.40	0.08	0.15	0.98	0.08	0.98	2.50	7.20	0.05	0.13	0.99	0.02	0.97
		30	1.60	5.10	0.05	0.15	0.98	0.06	0.95	3.70	5.80	0.08	0.12	0.99	0.06	0.97
		40	3.70	4.40	0.12	0.14	0.98	0.13	0.97	1.90	4.80	0.05	0.11	0.99	0.04	0.97
	MRTD [N m s⁻¹]	10	2.50	19.30	0.05	0.34	0.90	0.04	0.90	6.10	19.70	0.08	0.23	0.95	0.08	0.95
		20	12.20	29.00	0.22	0.49	0.82	0.23	0.85	5.50	21.70	0.07	0.24	0.95	0.11	0.97
		30	−0.30	22.60	−0.01	0.38	0.89	0.08	0.90	5.80	15.40	0.07	0.18	0.97	0.10	0.95
		40	0.90	30.10	0.02	0.54	0.79	0.04	0.79	1.90	29.40	0.03	0.43	0.86	0.05	0.85
s2: tr1–tr2	MT [N m]	10	1.40	4.70	0.04	0.13	0.98	0.04	0.97	−0.50	12.40	−0.01	0.28	0.93	0.03	0.97
		20	0.90	5.20	0.03	0.16	0.98	0.01	0.95	2.90	6.00	0.07	0.14	0.98	0.06	0.98
		30	1.80	5.00	0.06	0.16	0.98	0.08	0.97	0.70	5.30	0.02	0.13	0.98	0.02	0.97
		40	0.00	4.40	0.00	0.14	0.98	0.01	0.98	0.60	4.80	0.02	0.12	0.99	0.03	0.98
	MRTD [N m s⁻¹]	10	8.00	13.70	0.15	0.25	0.95	0.16	0.94	−4.10	19.10	−0.06	0.27	0.94	0.04	0.95
		20	4.90	18.30	0.09	0.33	0.91	0.11	0.88	5.60	18.50	0.07	0.23	0.95	0.03	0.94
		30	−4.70	16.90	−0.10	0.32	0.91	0.02	0.90	0.30	17.40	0.00	0.23	0.95	0.02	0.95
		40	−2.70	19.40	−0.05	0.33	0.91	0.11	0.87	4.70	18.00	0.07	0.25	0.95	0.09	0.93
s1–s2	MT [N m]	10	10.00	9.30	0.27	0.25	0.94	0.24	0.94	12.90	17.60	0.18	0.25	0.94	0.18	0.94
		20	8.00	7.40	0.23	0.22	0.96	0.20	0.92	12.10	20.60	0.26	0.43	0.85	0.16	0.92
		30	8.80	8.00	0.27	0.25	0.95	0.25	0.88	8.00	18.90	0.19	0.44	0.85	0.15	0.90
		40	6.10	7.10	0.20	0.23	0.95	0.20	0.93	2.60	9.40	0.07	0.23	0.95	0.04	0.96
	MRTD [N m s⁻¹]	10	−7.90	22.50	−0.17	0.42	0.86	0.15	0.86	24.10	30.00	0.32	0.40	0.87	0.24	0.86
		20	2.20	18.00	0.04	0.34	0.91	0.04	0.88	11.30	31.90	0.15	0.39	0.88	0.07	0.91
		30	5.60	29.80	0.12	0.58	0.76	0.04	0.80	15.50	41.30	0.22	0.52	0.80	0.18	0.87
		40	1.10	26.00	0.02	0.49	0.81	0.08	0.82	18.10	30.70	0.28	0.45	0.84	0.26	0.88

s1 session 1; s2 session 2; tr1 trial 1; tr2 trial 2; MT maximum torque; MRTD maximum rate of torque development; PT pretension; MD mean difference; CV coefficient of variation; SDM standardized mean difference; SEM standard error of measurement; ICC intraclass correlation coefficient; d effect size; r _s Spearman's correlation coefficient
^◊Significant correlations (p <0.05)

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ISSN: 1861-6909

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