Effects of school-based high-intensity interval training on body composition, cardiorespiratory fitness and cardiometabolic markers in adolescent boys with obesity: a randomized controlled trial

Table 1 Exercise training data for the two training groups (mean ± SD)

	Weeks 1–4	Weeks 5–8	Weeks 9–12
HIIT (n = 15)
Work:Rest interval duration, s	15:15	15:15	15:15
Work:Rest interval intensity	90:50% MAS	95:50% MAS	100:50% MAS
Number of repetitions	8	8	8
Number of sets	2	2	2
Rest between sets, s	180	180	180
MHR, b.p.m	163 ± 16	168 ± 13	165 ± 14
%HR_max, %	81 ± 0	80 ± 0	81 ± 1
Duration, min	11	11	11
Attendance, %	91 ± 2	85 ± 11	91 ± 7
MICT (n = 15)
Work intensity	60% MAS	65% MAS	70% MAS
MHR, b.p.m	137 ± 11	142 ± 13	141 ± 12
%HR_max, %	71 ± 1	70 ± 1	70 ± 0
Duration, min	30	30	30
Attendance, %	84 ± 4	85 ± 12	87 ± 7

Data shown for participants who completed the intervention. MHR mean heart rate of training
* Training duration for HIIT includes 8 min exercise and 3 min resting interval, i.e., one 3-min breaks among 2 HIIT sets

ISSN: 1471-2431