Table 3. Deltoid muscle EMG results (N=40).

Position no	Mean ± SD
1*	0.16 ± 0.71
2	0.25 ± 0.65
3	0.28 ± 0.56
4	0.32 ± 0.49
5*	0.15 ± 0.46

* p<0.05, each position was compared to the fourth position.