Electromyographical Comparison of Four Common Shoulder Exercises in Unstable and Stable Shoulders

Table 4

Push-up Plus descriptive analysis with mean (Mn) and standard deviation (SD) values reported in two arcs. The results of each Kruskal-Wallis test are presented at the end of each column for the respective muscle and arc.

	Concentric		Eccentric
	Mn	Sd	Mn	Sd
Supraspinatus
Healthy	23	(15)	22	(14)
GL	26	(14)	28	(16)
MDI	21	(27)	17	(18)
AI	24	(13)	22	(10)
𝑃 =	0.53		0.31
Infraspinatus
Healthy	29	(13)	20	(11)
GL	29	(14)	36	(24)
MDI	31	(15)	23	(11)
AI	30	(14)	22	(10)
𝑃 =	0.97		0.40
Teres major
Healthy	10	(12)	7	(10)
GL	9	(8)	10	(11)
MDI	28	(37)	30	(31)
AI	11	(15)	5	(6)
𝑃 =	0.59		0.23
Middle deltoid
Healthy	23	(12)	14	(7)
GL	16	(12)	15	(12)
MDI	24	(16)	21	(12)
AI	15	(8)	15	(9)
𝑃 =	0.26		0.41
Upper trapezius
Healthy	17	(17)	13	(11)
GL	18	(10)	20	(9)
MDI	15	(16)	15	(16)
AI	16	(11)	15	(11)
𝑃 =	0.84		0.27
Serratus anterior
Healthy	77	(46)	45	(23)
GL	65	(34)	66	(39)
MDI	48	(18)	41	(25)
AI	55	(32)	39	(22)
𝑃 =	0.43		0.16