Table 4. Ecological validity of muscle activity during kuzushi without tsukuri performed with the judo ergometer (JERGo^©) system and with uke.

		Pulling arm		Lifting arm
		r	LOA	r	LOA
M. deltoideus	0-30 ms	.60*	–154.0 ± 141.7	.79**	–46.5 ± 59.2
	0-50 ms	.61*	2.4 ± 107.4	.68**	–61.5 ± 81.5
	0-100 ms	.69*	–148.0 ± 134.6	.62*	–101.7 ± 129.7
	0-200 ms	.62*	–124.9 ± 163.5	.69**	–134.5 ± 174.6
M. biceps brachii	0-30 ms	.76*	23.5 ± 62.1	.75**	91.5 ± 199.2
	0-50 ms	.75**	53.7 ± 82.6	.79**	122.0 ± 213.5
	0-100 ms	.60*	118.5 ± 141.7	.82**	96.6 ± 234.5
	0-200 ms	.70**	186.3 ± 146.9	.81**	64.7 ± 238.7
M. erector spinae	0-30 ms	.85**	13.6 ± 76.2	.88**	–40.9 ± 40.1
	0-50 ms	.85**	6.4 ± 78.6	.87**	171.3 ± 123.1
	0-100 ms	.85**	8.1 ± 72.9	.86**	–35.8 ± 40.8
	0-200 ms	.82**	35.1 ± 79.9	.79**	–2.4 ± 39.6
M. trapezius	0-30 ms	.71**	–142.0 ± 201.5	.45	50.7 ± 153.4
	0-50 ms	.71**	–131.6 ± 219.0	.41	30.1 ± 196.3
	0-100 ms	.70**	–116.8 ± 225.9	.41	–40.7 ± 230.3
	0-200 ms	.70**	–133.0 ± 431.6	.53	–99.2 ± 230.0

r = Pearson correlation coefficient, LOA = limits of agreement,^*p < 0.05,^**p < 0.01.