High-Intensity Strength Training Improves Function of Chronically Painful Muscles: Case-Control and RCT Studies

Table 1

Muscle fiber cross-sectional area, fiber type percentage, capillaries per fiber (CAF), and capillaries per fiber area (CAFA) in healthy controls (CON) and women with trapezius myalgia (MYA) at baseline and before and after 10-week intervention in the specific strength training (SST), general fitness training (GFT), and reference (REF) groups.

	Area (𝜇m^2)		Fiber type percentage (%)		Capillaries per fiber (CAF)		Capillaries per fiber area (CAFA)
	Type I	Type II	Type I	Type II	Type I	Type II	Type I	Type II
CON	5057±1120	4000±1104	67±11	33±11	4.23±0.74	3.15±0.72	0.89±0.15	0.84±0.17
MYA	5193±1110	3501±977	69±11	31±11	4.12±0.87	2.79±0.70	0.83±0.14	0.86±0.20
REF
Before	4941±399	3334±489	66±13	34±13	3.72±0.49	2.41±0.33	0.81±0.14	0.78±0.14
After	5299±1134	3471±684	66±14	34±14	3.97±0.53	2.60±0.61	0.83±0.18	0.78±0.16
GFT
Before	5555±1201	3794±796	69±11	31±11	4.39±0.80	3.10±0.51	0.85±0.19	0.89±0.25
After	5108±1030	3612±1070	72±11	28±11	4.18±0.43	2.93±0.57	0.85±0.15	0.87±0.34
SST
Before	5043±1294	3439±1331	69±12	31±12	4.15±1.09	2.80±0.95	0.85±0.13	0.88±0.22
After	5516±1188^#	4133±1145^$	70±10	31±10	4.53±0.82^#	3.31±0.64^$	0.88±0.13	0.85±0.17

#Tendency for increase from baseline to follow-up in SST, 𝑃<0.10.
$Significant increase from baseline to follow-up in SST, 𝑃<0.05.