Table 1.

Peak sEMG amplitude of muscles recorded for both sides of the body under different conditions and with different external loads.

Muscle group	%MVIC RIGHT SIDE	%MVIC LEFT SIDE	ES	%MVIC RIGHT SIDE	%MVIC LEFT SIDE	ES
	(95% CI)	(95% CI)		(95% CI)	(95% CI)
	85% 1 RM CONT			85 % 1RM SS
Anterior	114.6 ± 8.1	100.1 ± 6.1	2.02	101.1 ± 7.6	90.1 ± 4.5	1.76
deltoid	(108.8 to 120.4)	(95.7 to 104.5)		(95.7 to 106.5)	(86.9 to 93.3)
Pectoralis	66.4 ± 5.6	49.9 ± 4.9	3.14	56.6 ± 4.5	43.6 ± 3.3	3.29
major	(62.4 to 70.4)	(46.4 to 53.4)		(53.4 to 59.8)	(41.2 to 46.0)
Triceps brachii	79.8 ± 6.1	83.7 ± 4.6	0.72	59.4 ± 5.6	71.1 ± 3.1	2.59
	(75.4 to 84.2)	(80.4 to 87)		(55.4 to 63.4)	(68.9 to 73.3)
	100% 1RM CONT			100 % 1RM SS
Anterior	122.5 ± 6.0	108.3 ± 7.2	2.14	104.2 ± 4.0	97.2 ± 6.8	1.25
deltoid	(118.2 to 126.8)	(103.2 to 113.4)		(101.3 to 107.1)	(92.3 to 102.1)
Pectoralis	86.6 ± 6.3	70.5 ± 9.5	2.00	73.0 ± 4.8	63.0 ± 4.2	2.22
major	(82.1 to 91.1)	(63.7 to 77.3)		(69.6 to 76.4)	(60.0 to 66.0)
Triceps brachii	103.5 ± 5.5	96.4 ± 5.2	1.33	84.4 ± 8.6	83.5 ± 2.7	0.14
	(99.6 to 107.4)	(92.7 to 100.1)		(78.3 to 90.5)	(81.6 to 85.4)

Data are presented as mean ± standard deviation and 95% confidence interval (95% CI); CONT = control condition; SS = Sling shot condition; MVIC = maximum voluntary isometric contractions; ES = effect size.