Table 3. Multiple linear regression models obtained for muscle reaction time according to fat mass percentage.

Muscles	R2	Coefficient β	P value	95% CI
Rectus femoris
Model 1	0.10		ns
Intercept		82.09	ns	66.08	98.10
Overfat/obese		21.41	ns	2.72	40.10
Boys		10.50	ns	−8.30	29.30
Model 2	0.20		0.045
Intercept		88.02	0.000	76.01	99.98
Overfat/obese		18.24	0.046	0.38	36.09
Vastus medialis
Model 1	0.06		ns
Intercept		77.51	ns	66.52	88.51
Overfat/obese		9.84	ns	−2.98	22.68
Boys		0.50	ns	−12.40	13.42
Model 2	0.06		ns
Intercept		77.80	ns	69.68	86.92
Overfat/obese		9.69	ns	−2.37	21.76
Vastus lateralis
Model 1	0.18		0.019
Intercept		75.98	0.000	63.90	88.06
Overfat/obese		19.92	0.006	5.81	34.02
Boys		11.08	ns	−3.11	25.26
Model 2	0.23		0.018
Intercept		82.24	0.000	73.04	91.44
Overfat/obese		16.57	0.018	2.86	30.25

Notes.

95% CI

95% Confidence Interval

ns

no significant

The reference for the Overfat/obese category was the normal fat category. The reference for boys was girls.