Table 2.

Mean and SD of individual fibre type proportions (%) in the masseter and digastric for weeks 1, 4, 8, 14, and 20. For each age group: n = 4

	Week 1		Week 4		Week 8		Week 14		Week 20
	Mean	SD	Mean	SD	Mean	SD	Mean	SD	Mean	SD
Masseter fibre type
IIA/IIA + IIX	81.42	12.26	61.97	5.56	39.17	12.96	56.51	9.45	73.26	5.49
IIX	8.05	13.22	0.20	0.18	0.06	0.11	5.62	7.12	1.55	2.88
I	0.47	0.40	0.43	0.20	0.58	0.42	0.61	0.92	0.34	0.28
Cardiac α	0.92	0.78	9.93	3.82	28.96	18.96	10.37	8.48	6.57	4.28
Cardiac α + I	5.44	2.26	11.58	2.49	17.08	11.78	16.69	5.50	14.07	2.72
I + IIA	0.44	0.51	0.70	0.42	0.70	1.19	0.78	1.46	0.04	0.09
I + IIX	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00
Cardiac α + IIA	2.70	2.67	14.64	6.48	12.79	4.49	8.10	6.86	4.06	2.49
Cardiac α + IIX	0.03	0.06	0.03	0.06	0.00	0.00	0.00	0.00	0.00	0.00
Cardiac α + I + IIA	0.53	0.45	0.52	0.51	0.66	0.80	1.31	1.78	0.11	0.17
Digastric fibre type
IIA/IIA + IIX	93.78	2.12	85.05	2.15	73.75	2.67	69.06	4.79	73.07	4.44
IIX	0.29	0.29	0.91	1.82	1.77	3.54	3.15	4.20	0.72	0.81
I	0.10	0.20	0.22	0.23	0.20	0.32	2.46	1.80	5.66	0.86
Cardiac α	0.17	0.33	0.06	0.11	0.07	0.08	0.29	0.21	0.04	0.08
Cardiac α + I	5.11	1.45	6.08	2.32	18.28	2.54	21.97	2.78	20.12	4.24
I + IIA	0.00	0.00	1.07	0.84	0.28	0.57	0.06	0.08	0.04	0.08
I + IIX	0.03	0.07	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00
Cardiac α + IIA	0.07	0.09	2.76	2.18	2.73	0.41	2.02	0.89	0.21	0.20
Cardiac α + IIX	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00
Cardiac α + I + IIA	0.45	0.52	3.86	1.53	2.75	1.93	0.98	0.56	0.15	0.30