Table 3. Comparison of back knee angle (Unit: score)

Group	Pre	Post	Difference value	Time (P value)	Group×time (P value)	Group (P value)	t value	P value
EG	170.87±5.10	173.72±5.00	2.85±2.36	< 0.01*	0.03*	0.73	4.36	< 0.01*
CG	171.05±5.10	171.88±7.01	0.86±1.72	-	-	-	1.74	0.11

EG: experimental group (with small props).
CG: control group (without small props).
Pre: before intervention (mean ± standard deviation).
Post: after intervention (mean ± standard deviation).
Difference value: change between pre and post.
Time (P value): P-value for within-group change over time.
Group×time (P value): P-value for interaction between group and time.
Group (P value): P-value comparing groups (post–pre difference).
P value (Bonferroni adjusted, α = 0.025): Bonferroni-corrected p-value for multiple comparisons.
P < 0.05.