TABLE 3.

Forehand technique assessment with the “Tennis rating score for children” at baseline, post intervention and 1-year follow-up.

	EG2				EG1				CG2				CG1
TRSC item	BDC	POST	FU	p-value	BDC	POST	FU	p-value	BDC	POST	FU	p-value	BDC	POST	FU	p-value
1a	2.1 ± 0.7	2.5 ± 0.5	3.9 ± 0.5*	<0.001	2.3 ± 0.5	2.5 ± 0.5	3.5 ± 0.5*	<0.001	2.7 ± 0.5	4.1 ± 0.7*	4.9 ± 0.3*	<0.001	2.1 ± 0.5	3.5 ± 0.5*	4.2 ± 0.4*	<0.001
1b	2.3 ± 0.8	3 ± 0.5*	4.2 ± 0.8*	<0.001	2.5 ± 0.8	2.9 ± 0.6*	3.8 ± 0.4*	<0.001	2.4 ± 0.9	3.7 ± 0.5*	4.3 ± 0.9*	<0.001	2.3 ± 0.8	2.9 ± 0.5*	3.8 ± 0.4*	<0.001
1c	2 ± 0.6	2.9 ± 0.7*	4.2 ± 0.8*	<0.001	2.1 ± 0.6	2.9 ± 0.4*	3.8 ± 0.4*	<0.001	2.3 ± 0.9	3.3 ± 0.9*	4.3 ± 0.9*	<0.001	1.9 ± 0.4	2.9 ± 0.3*	3.8 ± 0.4*	<0.001
2a	2.1 ± 0.7	2.9 ± 0.7*	4.2 ± 0.6*	<0.001	2.4 ± 0.5	2.6 ± 0.5	3.6 ± 0.4*	<0.001	2.3 ± 0.8	3.3 ± 0.7*	4.4 ± 0.6*	<0.001	2.1 ± 0.6	2.9 ± 0.5*	3.3 ± 0.4*	<0.001
2b	2.2 ± 0.8	3.7 ± 0.5*	4.7 ± 0.4*	<0.001	2.3 ± 0.5	3.1 ± 0.4*	3.4 ± 0.5	<0.001	2.1 ± 0.8	3.1 ± 0.7*	4.1 ± 0.6*	<0.001	2.1 ± 0.6	2.5 ± 0.5*	3.2 ± 0.7*	<0.001
2c	1.8 ± 0.4	2.8 ± 0.6*	4.3 ± 0.8*	<0.001	1.9 ± 0.4	2.7 ± 0.5*	3.4 ± 0.5*	<0.001	2 ± 0.7	2.9 ± 0.5*	4 ± 0.4*	<0.001	1.9 ± 0.4	2.6 ± 0.5*	3.3 ± 0.6*	<0.001
3a	2.3 ± 0.8	4.4 ± 0.5*	5 ± 0*0*	<0.001	2.4 ± 0.5	3.9 ± 0.7*	4.5 ± 0.5*	<0.001	2.5 ± 0.8	2.9 ± 0.5	3.8 ± 0.6*	<0.001	2 ± 0.6	2.4 ± 0.5	3.1 ± 0.3*	<0.001
3b	2.1 ± 0.7	2.8 ± 0.8*	3.9 ± 0.7*	<0.001	2.2 ± 0.7	2.9 ± 0.5*	3.8 ± 0.4*	<0.001	2.3 ± 0.8	2.9 ± 0.5*	4 ± 0.6*	<0.001	2 ± 0.6	2.5 ± 0.5*	3.4 ± 0.5*	<0.001
3c	2.5 ± 1.1	3.2 ± 0.6*	4.2 ± 0.5*	<0.001	2.7 ± 0.7	2.9 ± 0.6	3.7 ± 0.6*	<0.001	2.9 ± 1.1	3.5 ± 0.7	4.5 ± 0.6*	<0.001	2.3 ± 0.8	2.5 ± 0.5	3.5 ± 0.5*	<0.001
4a	2.8 ± 1	3.3 ± 0.6	4 ± 0.5*	0.001	2.7 ± 0.8	2.9 ± 0.7	3.3 ± 0.6*	0.001	2.8 ± 1	3.8 ± 0.6*	4.7 ± 0.4*	<0.001	2.5 ± 0.6	3 ± 0.6*	3.9 ± 0.6*	<0.001
4b	1.9 ± 0.8	2.4 ± 0.7*	3.4 ± 0.6*	<0.001	2.3 ± 0.6	2.5 ± 0.5	3.5 ± 0.5*	<0.001	2.3 ± 0.8	4 ± 0.6*	4.8 ± 0.5*	<0.001	1.8 ± 0.7	3.2 ± 0.7*	3.9 ± 0.6*	<0.001
4c	2.8 ± 0.4	2.9 ± 0.3	3.4 ± 0.5*	0.002	2.9 ± 0.5	3.1 ± 0.3	3.6 ± 0.5*	<0.001	2.8 ± 0.5	3.7 ± 0.7*	4.6 ± 0.5*	<0.001	2.7 ± 0.6	2.9 ± 0.4	3.8 ± 0.4*	<0.001
5a	2.3 ± 0.8	3.4 ± 0.5*	4.7 ± 0.5*	<0.001	2.5 ± 0.5	3.1 ± 0.4*	3.8 ± 0.6*	<0.001	2.5 ± 0.8	3.1 ± 0.7*	4.1 ± 0.5*	<0.001	2 ± 0.6	2.2 ± 0.4	3.1 ± 0.5*	<0.001
5b	2 ± 0.6	3.8 ± 0.4*	4.9 ± 0.3*	<0.001	2 ± 0.50.5	3.3 ± 0.4*	3.7 ± 0.4*	<0.001	2.2 ± 0.7	3.1 ± 0.7*	4 ± 0.6*	<0.001	1.9 ± 0.4	2.3 ± 0.5*	2.7 ± 0.6*	0.001
5c	1.8 ± 0.4	4 ± 0.4*	4.9 ± 0.3*	<0.001	2.1 ± 0.3	3.4 ± 0.5*	4.2 ± 0.6*	<0.001	2 ± 0.6	2.7 ± 0.5*	3.9 ± 0.5*	<0.001	1.9 ± 0.4	2.4 ± 0.5*	2.6 ± 0.5	0.001

EG2 – group with 2 exergame and 2 regular tennis trainings/week; EG1 – group with 1 exergame and 1 regular tennis trainings/week; CG2 – group 2 regular tennis trainings/week; CG1 – group with 1 regular tennis training/week. BDC – baseline; POST – post intervention; FU – follow-up after 1 year; 1 = shot preparation: 1a = arm position, 1b = backswing, 1c = stance; 2 = acceleration: 2a = weight transfer, 2b = hitting motion, 2c = racquet path; 3 = point of contact: 3a = height, 3b = body position, 3c = sweet spot; 4 = follow through: 4a = end position, 4b = racquet position, 4c = non-dominant arm position; 5 = kinetic chain: 5a = sequence of activated body segments, 5b = fluidity, 5c = timing. *Significant different from the previous measurement at p < 0.017.