Table 2.
Effect of the physical education-based stretching program on hamstring extensibility (classic sit-and-reach scores, cm). Data are reported as means (±standard deviation).
| Group | Pre-intervention (1) |
Post-development (2) |
Post-maintenance (3) |
pa | Effect sizeb | ||
|---|---|---|---|---|---|---|---|
| 1-2 | 2-3 | 1-3 | |||||
| EG1 (n = 44) ## | 16.8 (5.4) | 19.5 (6.0) *** | 20.1 (5.6) *** | <.001 | .49 | .03 | .52 |
| EG2 (n = 51) # | 16.8 (5.5) | 19.1 (5.1) *** | 19.1 (5.0) *** | .42 | - .10 | .33 | |
| CG (n = 45) | 15.3 (5.2) | 15.4 (4.9) | 15.8 (5.7) | .07 | .13 | .20 | |
EG1, experimental group 1; EG2, experimental group 2; CG, control group;
a Significance level from the two-way analysis of variance with the post hoc analyses with Bonferroni adjustment. Between-groups pairwise comparisons: Differences statistically significant from CG (# p < 0.05, ## p < 0.01). Within-groups pairwise comparisons: Change statistically significant from pre-intervention to post-development and from post-development to post-maintenance (*** p < 0.001);
b Hedges’ g effect size. Rows from top to bottom: EG1-CG, EG2-CG, and EG1-EG2.