Table 1 Comparison for muscle activities on open chain and closed chain exercise (unit : %MVIC, N=13)

Muscles	Open chain exercise	Closed chain exercise	t	p
Serratus anterior	42.08±20.44	12.65±6.37	-6.00	0.00
Upper trapezius	5.13±2.45	4.36±1.6	-1.00	0.33
Pectoralis major	6.94±3.23	20.91±8.06	7.17	0.00
A ratio Serratus anterior / upper trapezius	10.47±8.54	3.31±1.92	-3.03	0.01
A ratio Serratus anterior / pectoralis major	7.62±5.86	0.63±0.25	-4.38	0.00