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Table 3 Comparison of sagittal joint kinetics and kinematics in multi-directions jump landing between the ACLr and control groups

From: Residual deficits of knee and hip joint coordination and clinical performance after return to sports in athletes with anterior cruciate ligament reconstruction

Athlete

Direction

 

Hip excursion (degrees)

Hip angular velocity at IC (degrees/sec)

Hip angular velocity at peak vGRF (degrees/sec)

Knee excursion (degrees)

Knee angular velocity at IC (degrees/sec)

Knee angular velocity at peak vGRF (degrees/sec)

Hip extensor moment at peak vGRF (Nm/kg)

Knee extensor moment at peak vGRF (Nm/kg)

Ankle plantar flexor moment at peak vGRF (Nm/kg)

ACL group (n = 8)

0° (Forward)

Mean

17.5

109.1

179.3

39.7

278.3

367.2

3.02 c

0.53

2.44

SD

4.3

34.4

25.1

10.0

58.4

49.0

0.44

0.24

0.25

95% CI

11.2–23.8

44.4–173.8

120.6–237.9

30.3–49.0

201.9–354.6

300.6–433.8

2.08–3.97

0.01–1.04

1.91–2.98

30° diagonal

Mean

18.8

103.7 b

178.3

35.6

309.9 c

375.9c

3.20 c

0.51

2.29b,c

SD

3.6

44.4

28.4

9.5

70.6

53.4

0.35

0.22

0.27

95% CI

12.4–25.2

60.5–146.9

136.4–220.1

27.0–44.2

252.7–367.0

328.9–423.0

2.46–3.95

0.05–0.97

1.71–2.87

60° diagonal

Mean

19.1

52.9a

160.7

36.4

255.2

376.1

3.23c

0.53 c

2.73

SD

4.2

26.3

26.5

7.4

67.5

40.9

0.40

0.28

0.20

95% CI

12.8–25.4

13.2–92.6

121.3–200.0

29.7–43.0

202.1–308.3

328.1–424.2

2.38–4.08

−0.08–1.14

2.30–3.15

90° (Lateral)

Mean

22.8

40.3

177.2

35.6

196.0a

343.4a

4.11

0.10

2.93

SD

7.3

22.2

34.2

9.6

31.6

53.9

0.35

0.27

0.16

95% CI

15.3–30.2

9.0–71.6

140.8–213.6

27.7–43.4

168.8–223.1

302.7–384.2

3.37–4.86

−0.48–0.68

2.6–3.27

Control group

(n = 8)

0° (Forward)

Mean

19.1

96.5

193.2

41.5

210.9

355.4

2.24a,b,c

1.23a,b,c

2.36a,b,c

SD

7.5

81.8

76.4

8.0

86.9

77.1

0.44

2.40

0.25

95% CI

12.8–25.4

31.8–161.2

134.5–251.8

32.2–50.9

134.5287.2

288.8–422.0

1.3–3.19

0.72–1.75

1.83–2.89

30° diagonal

Mean

19.1

122.5

190.3

39.9

304.0c

393.0c

2.96

1.05

2.31

SD

8.1

39.2

49.9

7.1

34.0

36.3

0.35

0.22

0.27

95% CI

12.6–25.5

79.3–165.8

148.4–232.2

31.3–48.5

246.8–361.1

345.9–440.1

2.21–3.70

0.59–1.52

1.73–2.89

60° diagonal

Mean

19.8

101.3

183.3

37.9

274.5 c

368.8

2.95

0.88

2.53

SD

7..57

47.6

47.0

5.4

27.2

51.7

0.40

0.28

0.20

95% CI

13.5–26.2

61.7–141.0

144.0–222.7

31.2–44.6

221.4–327.5

320.7–416.8

2.1–3.8

0.27–1.49

2.10–2.96

90° (Lateral)

Mean

20.4

59.3

184.9

35.8

178.7a,b

331.1a

3.45

0.42

3.05

SD

7.1

36.7

36.5

4.8

19.6

14.6

0.35

0.27

0.16

95% CI

13.0–27.9

61.7–141.0

148.5–221.4

28.0–43.7

151.6–205.9

290.4–416.8

2.71–4.19

− 0.16–1

2.72–3.39

Main effect ANOVA (p-value)

Group

0.99

0.39

0.597

0.255

0.491

0.897

0.302

0.129

0.887

Direction

0.43

0.03

0.335

0.217

0.01

0.026

0.001

0.005

0.004

Interaction

0.295

0.342

0.719

0.754

0.215

0.609

0.518

0.580

0.767

  1. Bold values indicate statistically significant differences (p < 0.05) of direction effect
  2. ACLr anterior cruciate ligament reconstruction, ANOVA analysis of variance, CI confidence interval, IC initial contact, SD standard deviation, vGRF vertical ground reaction force
  3. aStatistically significant difference compared with the 30° diagonal direction (< 0.05)
  4. bStatistically significant difference compared with the 60° diagonal direction (< 0.05)
  5. cStatistically significant difference compared with lateral direction (< 0.05)
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Knee Surgery & Related Research

ISSN: 2234-2451