Figure 3.

Forest plot of the effects from a fixed-effects meta-analysis shown as standardized mean difference with 95% confidence intervals on maximum oxygen uptake (VO_2max) for all studies. For each study, the square represents the standardized mean difference between pre- and post-intervention time points and, whenever possible, between pre- post-data of both intervention and control groups with the horizontal line intersecting it as the lower and upper limits of the 95% confidence interval. The rhombi represent the pooled estimated standardized mean difference. Note. * Pre-post tests, IF intervention; ** Pre-post tests, IF intervention vs. control.