Table 4. Mean (±standard deviation) absolute and relative (percentage) values for pre-, mid- and post-measures for all physical fitness tests. ABPT group: alternated balance exercises prior to plyometric exercises in pairs. BBPT group: blocks of balance exercises prior to plyometric exercises.
Variables Group ABPT (n=13) Group BBPT (n=13) p-value (Cohen’s d)
Pre Mid Post ∆ (%) Pre Mid Post ∆ (%) MefT MefGr IefGrT
Pre-mid Pre-post Pre-mid Pre-post
Muscular Power
Countermovement
Jump (cm)		 22.5
(1.8)		 25.6
(3.1)		 27.0
(2.9)		 14 20 22.4
(2.7)		 25.0
(3.7)		 27.9
(3.5)		 12 25 .000
(3.4)		 .98
(0)		 .26
(.48)
Standing Long
Jump (cm)		 183
(16)		 194
(13)		 205
(13)		 6 12 185
(16)		 195
(16)		 207
(17)		 5 12 .000
(3.3)		 .81
(.09)		 .86
(.13)
Triple Hop Test
(cm)		 561
(36)		 583
(37)		 610
(32)		 4 9 572
(21)		 600
(29)		 610
(38)		 5 7 .000
(2.14)		 .40
(.35)		 .34
(.42)
Relative Leg
Stiffness (kN/m•kg)		 23.8
(6.0)		 26.1
(4.5)		 29.0
(4.2)		 10 22 22.5
(4.8)		 24.2
(5.5)		 29.7
6.8)		 7 32 .000
(2.38)		 .67
(.18)		 .22
(.52)
Muscle Strength
Reactive Strength
Index (mm/ms)		 .8
(.3)		 1.14
(.22)		 1.21
(.19)		 43 51 .79
(.25)		 1.15
(.26)		 1.31
(.27)		 46 66 .000
(3.53)		 .71
(.16)		 .29
(.46)
Isometric Back
Strength (kg)		 78
(16)		 82
(16)		 89
(14)		 6 15 80
(13)		 85
(14)		 90
(17)		 5 12 .000
(1.73)		 .80
(.14)		 .72
(.16)
Knee Extension
MVIC (N)		 181
(18)		 246
(46)		 321
(31)		 36 78 179
(30)		 253
(32)		 285
(30)		 41 59 .000
(4.45)		 .26
(.47)		 .02
(.82)
Speed
Sprint 10-m 1.98
(.07)		 1.95
(.06)		 1.90
(.06)		 -2 -4 2.01
(.08)		 1.91
(.10)		 1.86
(.08)		 -5 -7 .000
(2.63)		 .60
(.22)		 .01
(.89)
Sprint 30-m 4.85
(.19)		 4.78
(.20)		 4.76
(.19)		 -1 -2 4.91
(.16)		 4.74
(.17)		 4.70
(.15)		 -3 -4 .000
(2.25)		 .83
(.09)		 .04
(.86)
Agility
Agility : 4 × 9.1m
(s)		 10.2
(.3)		 9.5
(.3)		 9.4
(.3)		 -7 -8 10.3
(.3)		 9.8
(.16)		 9.5
(.3)		 -5 -8 .000
(5.6)		 .21
(.52)		 .11
(.62)
Balance
Static Balance (s) 8.1
(9.2)		 14.9
(16.9)		 21.1
(21.5)		 83 159 6.6
(3.4)		 13.1
(9.6)		 15.7
(10.3)		 99 139 .000
(1.82)		 .55
(.25)		 .42
(.35)
Composite Score Y-Balance Test (%) 96
(5)		 104
(8)		 107
(9)		 8 12 95
(7)		 100
(6)		 101
(6)		 5 6 .000
(2.44)		 .14
(.62)		 .02
(.82)