Optimal Values of Body Composition for the Lowest Risk of Failure in Tabata Training’s Effects in Adolescents: A Pilot Study

Table 2

The sensitivity and specificity for the risk of lack of positive changes in the physical efficiency index (PEI) by BMI intervals and FMI quartiles.

Body mass index (BMI)		Fat mass index (FMI)
Intervals (kg/m^2)	Youden index ()	Quartiles ()	Youden index ()
≤19.00	Reference groups	Below	Reference groups
19.01-22.00	0.10		0.02
22.01-25.00	0.02		0.15
>25.00	0.08	Over	0.03

: between quartile and ; : between quartile and .