Journal of Sports Science and Medicine

Variable

ROL

RAL

ROL vs. RAL

ELITE

vs. ROL

vs. RAL

Jump Height (cm)

14.3 ± 8.2

19.4 ± 7.8

-2.22

0.053

-0.70

30.6 ± 9.8

-4.03

0.001*

-1.80

-2.83

0.011*

-1.27

Contact Time (ms)

460 ± 130

470 ± 120

-0.45

0.665

-0.14

368 ± 48

2.07

0.062

0.93

2.35

0.038

1.05

Average Forward Vel (m/s)

3.9 ± 0.7

4.0 ± 0.9

-0.24

0.816

-0.08

4.9 ± 0.4

-3.35

0.004*

-1.75

-2.53

0.026

-1.29

Peak vGRF (N/kg)

19.8 ± 3.4

26.9 ± 4.6

-6.13

<0.001*

-1.94

34.2 ± 6.6

-6.12

<0.001*

-2.74

-2.86

0.010*

-1.28

Peak tGRF (N/kg)

10.9 ± 2.6

13.4 ± 2.9

-4.29

0.002*

-1.35

17.9 ± 2.3

-6.41

<0.001*

-2.87

-3.84

0.001*

-1.72

Peak hGRF (N/kg)

1.5 ± 0.8

6.8 ± 2.3

-8.00

<0.001*

-2.53

8.1 ± 3.6

-5.53

<0.001*

-2.47

-0.94

0.362

-0.42

Ext. Foot Pos (°)

-22 ± 21

-78 ± 10

7.39

<0.001*

2.34

-82 ± 4

8.86

<0.001*

3.96

1.25

0.236

0.56

Ankle Angle at IC (°)

-16 ± 13

-22 ± 9

2.16

0.059

0.68

-17 ± 9

0.31

0.760

0.14

-1.11

0.281

-0.50

Peak Ankle Angle (°)

38 ± 9

36 ± 7

1.38

0.200

0.44

34 ± 7

1.16

0.261

0.52

0.45

0.659

0.20

Peak M_Ankle (Nm/kg)

3.1 ± 0.5

2.5 ± 0.4

2.88

0.018

0.91

2.9 ± 0.3

1.22

0.237

0.55

-2.24

0.038

-1.00

Peak AT_MA (mm)

47.9 ± 8.9

51.5 ± 9.0

-1.81

0.103

-0.57

52.4 ± 8.5

-1.16

0.262

-0.52

-0.24

0.813

-0.11

Peak AT Force (N)

5278 ± 1227

3960 ± 1181

4.10

0.003*

1.30

4007 ± 899

2.64

0.017

1.18

-0.10

0.921

-0.05

Peak AT Force (N/kg)

67.7 ± 18.9

50.1 ± 14.2

2.38

0.005*

1.17

55.3 ± 10.7

1.82

0.085

0.81

-0.92

0.368

-0.41

* indicate significant different at an alpha level of 0.016 (Bonferroni correction). ROL: recreational original landing; RAL: recreational adjusted landing; ELITE: elite player scissor kick jump; t: test statistic; P: probability value; d: Cohen’s d effect size; V_Forward: average forward velocity; vGRF: vertical ground reaction force; tGRF: transverse ground reaction force; hGRF: horizontal ground reaction force; Ext. Foot Pos: external foot position; A negative external foot position corresponds to an external rotation; A positive ankle angle is corresponding to a dorsi flexion angle; M_Ankle: Sagittal ankle moment; AT_MA: Achilles tendon moment arm; AT: Achilles tendon; IC: initial contact.