Effects of High-Intensity Interval Training in School on the Physical Performance and Health of Children and Adolescents: A Systematic Review with Meta-Analysis

Sports Medicine - Open

Table 4 Hedges' g effect sizes and 95% confidence intervals for the differences in the effects of intra-PE HIIT and other forms of exercise on parameters related to health

Parameter	Number of studies	Number of participants	References	Hedges’ g	Cl (95%)
Parameter	Number of studies	Number of participants	References	Hedges’ g	Lower limit	Upper limit
Body mass index	3	673	[7, 8, 30]	2.76 ± 1.70	2.68	2.84
Weight	3	673	[7, 8, 30]	6.52 ± 10.57	6.27	6.78
Percentage body fat	2	585	[6, 30]	2.91 ± 7.32	2.76	3.06
Jump performance	2	636	[7, 30]	5.89 ± 5.67	5.63	6.15
Performance in field running tests	2	636	[7, 30]	− 2.37 ± 4.64	− 4.06	− 0.68
Number of sit-ups	2	636	[7, 30]	2.66 ± 2.02	2.61	2.72
Fasting level of blood glucose	1	37	[8]	− 2.68	− 2.71	− 2.65
Fasting level of blood insulin	1	37	[8]	11.12	11.1	11.13
Flexibility	1	551	[30]	− 0.45	− 0.48	− 0.42
Homeostatic model of assessment for insulin resistance (HOMA-IR)	1	37	[8]	29.08	29.08	29.08
Maximal aerobic speed	1	551	[30]	− 1.34	− 1.35	− 1.34
Maximal oxygen uptake	1	37	[8]	− 4.51	− 4.88	− 4.15
Number of push-ups	1	85	[7]	6.22	6.15	6.29
Shuttle run performance	1	37	[8]	− 16.07	− 16.43	− 15.71
Sprint performance	1	85	[7]	− 0.20	− 0.2	− 0.19