Table 3.  Mean (±SD) isokinetic peak torque and reciprocal strength ratios values per crossed combination of joint, motion, type of contraction, PTA and body side in professional soccer players (N=100).

  Joint (motion)

Type of contraction (testing speed)

Professional Training Age (PTA)

5-7 years (N=34)

8-10 years (N=30)

≥ 11 years (N=36)

Right

Left

Right

Left

Right

Left

Knee

Extension

Con  60

236 (32)

227 (34)

251 (42)

245 (36)

240 (34)

235 (34)

Con 180

165 (23)

161 (22)

173 (29)

173 (6)

170 (26)

167 (24)

Con 300

133 (17)

132 (19)

137 (23)

137 (18)

137 (21)

135 (18)

Ecc  60

310 (60)

299 (55)

325 (53)

314 (52)

318 (66)

306 (74)

Ecc 180

282 (53)

285 (65)

303 (44)

299 (44)

295 (64)

293 (67)

Flexion

Con 60

133 (25)

126 (24)

141 (24)

140 (26)

140 (22)

138 (20)

Con 180

103 (18)

96 (17)

110 (16)

106 (19)

107 (17)

105 (15)

Con 300

92 (17)

87 (16)

99 (13)

98 (15)

93 (15)

95 (18)

Ecc 60

184 (42)

183 (43)

189 (44)

193 (39)

203 (32)

200 (46)

Ecc 180

180 (38)

179 (36)

190 (36)

187 (45)

194 (39)

194 (38)

Ankle

Dorsal

flexion

Con 60

24 (5)

23 (5)

25 (5)

24 (5)

23 (6)

22 (5)

Ecc 60

50 (8)

50 (10)

50 (9)

52 (9)

49 (8)

48 (8)

Plantar
Flexion

Con 60

111 (22)

109 (19)

120 (22)

121 (23)

121 (25)

119 (25)

Ecc 60

212 (46)

207 (37)

218 (38)

215 (36)

216 (42)

204 (41)

Knee  Strength Ratios

Conv. ratio

60 deg/sec

.56 (.80)

.55 (.10)

.56 (.80)

.58 (.70)

.58 (.80)

.59 (.10)

180 deg/sec

.62 (.10)

.59 (.10)

.64 (.60)

.61 (.90)

.63 (.80)

.63 (.90)

300 deg/sec

.69 (.90)

.66 (.60)

.72 (.60)

.69 (.10)

.68 (.10)

.71 (.70)

Funct. ratio

60 deg/sec

.78 (.10)

.80 (.10)

.76 (.10)

.84 (.10)

.86 (.1 0)

.85 (.10)

180 deg/sec

1.09 (.20)

1.11 (.20)

1.10 (.20)

1.09 (.20)

1.14 (.20)

1.17 (.20)
Con = Concentric, Ecc = Eccentric, Conv = Conventional concentric knee ratio (Concentric Knee Flexion/Concentric Knee Extension), Funct = Functional knee ratio (Eccentric Knee Flexion/ Concentric Knee Extension).