Table 3.
Subgroup analysis of the effects comparison of HIIT and MICT interventions on CRF in children and adolescents.
| Subgroup | No. of Trials/Total No. (%) | Subjects (n) | SMD (95% CI) | Favors HIIT |
Favors MICT |
P Value |
P for Interaction |
|---|---|---|---|---|---|---|---|
| All studies | 18/18 (100) | 563 | 0.51 (0.33, 0.69) |
|
0.00 | ||
| Modality of INT | |||||||
| Cycling | 5/17 (29) | 153 | 0.54 (0.16, 0.92) | 0.04 | 0.94 | ||
| Running | 12/17 (71) | 382 | 0.53 (0.31, 0.75) | 0.00 | |||
| INT duration | |||||||
| ≤8 weeks | 8/18 (44) | 212 | 0.41 (0.14, 0.68) | 0.01 | 0.23 | ||
| >8 weeks | 10/18 (56) | 351 | 0.59 (0.35, 0.84) | 0.00 | |||
| Work: rest ratio | |||||||
| ≤1 | 8/17 (47) | 207 | 0.38 (0.10, 0.66) | 0.08 | 0.16 | ||
| >1 | 9/17 (53) | 252 | 0.60 (0.35, 0.86) | 0.00 | |||
| Total bouts | |||||||
| ≤180 | 8/14 (57) | 242 | 0.46 (0.20, 0.71) | 0.01 | 0.91 | ||
| >180 | 6/14 (43) | 149 | 0.44 (0.11, 0.76) | 0.01 | |||
| Risk of bias | |||||||
| high | 3/18 (17) | 41 | 0.42 (0.21, 0.63) | 0.00 | 0.75 | ||
| Medium | 14/18 (77) | 497 | 0.77 (0.19, 1.23) | 0.00 | |||
| Low | 1/18 (6) | 25 | 0.79 (0.33, 1.39) | 0.01 | |||
CRF, Cardiorespiratory fitness; HIIT, high-intensity interval training; MICT, moderate-intensity continuously training; INT, intervention.