Table 1.

Mean, SD and CV% of the normalized RMS values expressed as percentage for the lateral, long and medial heads of TB of 18 subjects for every 5 s during a total of 90 s contraction period

Contraction		Lateral Head			Long Head			Medial Head
Period	Seconds	Mean	SD	CV%	Mean	SD	CV%	Mean	SD	CV%
1	01–05	56.93	13.55	23.80	62.44	14.95	23.94	73.76	7.02	9.52
2	06–10	54.57	12.51	22.92	60.45	14.95	24.73	73.22	5.67	7.74
3	11–15	55.72	12.61	22.63	62.21	17.36	27.91	74.12	10.91	14.72
4	16–20	55.75	13.98	25.08	68.47	21.26	31.05	76.06	9.52	12.52
5	21–25	56.65	11.42	20.16	62.61	21.78	34.79	74.63	10.24	13.72
6	22–30	56.92	18.17	31.92	68.22	25.89	37.95	76.79	11.29	14.70
7	31–35	56.58	14.74	26.05	62.69	23.35	37.25	77.17	10.82	14.02
8	36–40	57.07	14.16	24.81	66.98	20.26	30.25	76.56	9.39	12.26
9	41–45	56.41	10.84	19.22	62.00	14.102	22.75	75.34	11.39	15.12
10	46–50	57.23	13.12	22.93	61.14	13.53	22.13	75.72	9.60	12.68
11	51–55	56.44	12.87	22.80	59.68	14.86	24.90	76.44	10.24	13.40
12	56–60	55.22	14.52	26.29	58.84	12.07	20.51	74.66	10.91	14.61
13	61–65	52.98	13.09	24.71	54.31	12.54	23.09	75.77	7.63	10.07
14	66–70	51.94	12.57	24.20	52.64	13.27	25.21	72.96	8.61	11.80
15	76–75	51.03	10.63	20.83	52.12	13.81	26.50	71.68	7.34	10.24
16	76–80	50.04	10.45	20.88	51.20	19.00	37.11	71.07	7.51	10.57
17	81–85	49.75	12.41	24.94	49.29	15.57	31.59	68.51	7.52	10.98
18	86–90	49.29	10.02	20.33	48.05	14.20	29.55	66.11	8.36	12.65