. 2021 Jun 18;2021:9938344. doi: 10.1155/2021/9938344

Table 1.

Comparison of study outcomes among the groups playing modified recreational volleyball (MRV; n=17) and traditional recreational volleyball (RV; n=17) at baseline and after 12 weeks.

Group	Pre-test	Post-test	Mean change [95% CIs]	A2x2 mixed ANOVA: group-by-time interaction effect
Group	Pre-test	Post-test	Mean change [95% CIs]	F_{(1, 32)}	p	ŋ _p ²	1-β
Bodyweight^¥ (kg)
MRV	86.33 ± 6.27	84.08 ± 6.04	−2.50 (−2.90,−1.60)^∗∗	22.11	<0.001	0.50	0.99
RV	87.00 ± 4.31	86.83 ± 4.15	-0.17 (-0.28, -0.48)	22.11	<0.001	0.50	0.99
BMI^¥ (kg/m²)
MRV	26.42 ± 1.63	25.73 ± 1.77	−0.69 (−0.88,−0.50)^∗∗	26.27	<0.001	0.54	0.99
RV	25.90 ± 1.50	25.88 ± 1.48	-0.03 (-0.22, 0.16)	26.27	<0.001	0.54	0.99
Rest HR^¥ (bpm)
MRV	67.83 ± 3.38	64.42 ± 2.84	−3.42 (−4.17,−2.67)^∗∗	19.32	<0.001	0.47	0.99
RV	68.67 ± 2.57	67.50 ± 2.11	−1.17 (−1.92,−0.42)^∗∗	19.32	<0.001	0.47	0.99
SBP^¥ (mmHg)
MRV	133.08 ± 10.16	128.50 ± 7.62	−4.58 (−6.49,−2.67)^∗∗	2.56	0.12	0.10	0.33
RV	134.67 ± 6.54	132.17 ± 6.60	−2.50 (−4.41,−0.59)^∗∗	2.56	0.12	0.10	0.33
DBP^¥ (mmHg)
MRV	86.67 ± 4.42	85.25 ± 4.48	−1.42 (−2.47,−0.37)^∗∗	1.35	0.26	0.06	0.20
RV	87.08 ± 4.38	86.50 ± 3.78	-0.58 (-1.64, 0.47)	1.35	0.26	0.06	0.20
MAP^¥ (mmHg)
MRV	102.10 ± 6.11	99.72 ± 5.20	-2.38 (-7.20, 2.20)	3.35	0.08	0.13	0.42
RV	102.89 ± 4.69	101.71 ± 3.97	-1.18 (-4.86, 2.50)	3.35	0.08	0.13	0.42
YYIR1 (m)
MRV	896.00 ± 40.00	1064.00 ± 92.00	138.00 (128.00,206.00)^∗∗	26.19	<0.001	0.58	0.99
RV	898.00 ± 27.00	928.00 ± 44.00	30.00 (-11.00, 71.00)	26.19	<0.001	0.58	0.99
Handgrip (kg)
MRV	51.82 ± 4.60	52.45 ± 4.61	0.64 (-0.56, 1.83)	1.02	0.33	0.05	0.16
RV	52.50 ± 4.70	52.30 ± 4.52	-0.20 (-1.45, 1.05)	1.02	0.33	0.05	0.16
CMJ (cm)
MRV	33.05 ± 9.87	35.11 ± 8.97	2.06 (-0.52, 4.65)	0.67	0.42	0.03	0.12
RV	34.75 ± 9.06	35.35 ± 9.30	0.60 (-2.11, 3.31)	0.67	0.42	0.03	0.12

Values are Mean±SD. Abbreviations: ^¥ reverse scoring; BMI, body mass index; HR, heart rate; SBP, systolic blood pressure; DBP, diastolic blood pressure; MAP, mean arterial pressure; YYIR1, Yo-Yo intermittent recovery test level 1; CMJ, countermovement jump; mean change [95% CIs], mean difference from pre- to post-tests with 95% confidence intervals; F(df_factor, df_error), F-statistic; p, p value; ŋ_p², partial eta squared; 1-β, post-hoc statistical power of the test; ^∗∗ significant pre-to post-tests change at p<0.01; ^∗ significant pre-to post change at p<0.05.