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Table 2 Within-group and between-group effects for variables (posteromedial direction of modified star excursion balance, peak torque, and Joint position sense error) without significant interaction

From: The effect of the combination of whole body vibration and shoe with an unstable surface in chronic ankle instability treatment: a randomized clinical trial

Variable

Group

Pre-intervention

Post-intervention

Follow-up

Within-group

Between-group

F

P

F 2, 31

P

Modified star excursion balance test (%)

 Posteromedial

WBV-S

90.77 (11.68)

96.88 (13.96)

103.79 (15.39)

F 2, 62 = 19.42

< 0.001 †

0.20

0.81

WBV

87.14 (13.90)

97.90 (18.21)

97.58 (14.64)

CON

90.10 (17.53)

96.04 (14.74)

94.91 (13.38)

Peak torque (nm/kg)

 Concentric evertor

WBV-S

23.41 (7.12)

26.26 (8.01)

NA

F 1, 31 = 0.47

0.49

2.61

0.08

WBV

20.15 (5.31)

15.70 (6.12)

NA

CON

24.75 (17.29)

22.65 (9.15)

NA

 Eccentric evertor

WBV-S

33.55 (9.08)

32.96 (8.79)

NA

F 1, 31 = 0.03

0.85

0.56

0.57

WBV

28.88 (9.33)

30.49 (8.85)

NA

CON

33.45 (13.21)

33.16 (11.92)

NA

 Concentric invertor

WBV-S

32.07 (7.32)

31.75 (9.96)

NA

F 1, 31 = 0.02

0.87

1.04

0.36

WBV

24.66 (10.33)

26.70 (10.44)

NA

CON

31.69 (16.34)

29.70 (14.65)

NA

 Eccentric invertor

WBV-S

31.96 (7.89)

32.13 (9.65)

NA

F 1, 31 = 0.38

0.53

2.00

0.15

WBV

28.50 (9.83)

24.03 (3.73)

NA

CON

31.45 (16.35)

32.03 (18.03)

NA

Joint position sense error (degrees)

 Active 5°

WBV-S

2.85 (1.46)

4.11 (2.15)

NA

F 1, 31 = 3.47

0.06

0.96

0.39

WBV

3.53 (1.53)

4.61 (2.40)

NA

CON

3.34 (1.61)

3.22 (1.19)

NA

 Active 15°

WBV-S

4.54 (2.13)

3.45 (2.50)

NA

F 1, 31 = 1.08

0.30

2.34

0.11

WBV

4.36 (1.39)

3.92 (1.81)

NA

CON

2.26 (1.13)

3.07 (1.31)

NA

 Passive 5°

WBV-S

3.68 (1.27)

2.61 (2.08)

NA

F 1, 31 = 9.71

< 0.001 †

0.13

0.87

WBV

3.65 (1.30)

2.62 (0.92)

NA

CON

3.80 (1.47)

2.91 (1.07)

NA

 Passive 15°

WBV-S

4.82 (1.58)

2.99 (2.49)

NA

F 1, 31 = 4.29

0.05

0.17

0.84

WBV

4.34 (2.38)

3.33 (1.41)

NA

CON

3.31 (2.28)

3.70 (1.78)

NA

  1. Note: Values are means and (Standard Deviation). Significant post hoc difference between: † pre- and post-intervention
  2. Abbreviations: WBV Whole body vibration group, WBV-S Whole body vibration with shoe with an unstable surface group, CON Control group, NA Not applicable