Table 2 Changes in strain when ankle varus (20°) and valgus (20°) were added at the ankle joint with plantarflexion/dorsiflexion for each calcaneofibular ligament category

CFL20°

3.7 / -10.1

5.2 / -8.6

6.7 / -7.0

8.1 / -5.6

9.4 / -4.2

10.5 / -3.0

CFL30°

−6.1 / 5.0

−3.7 / -2.1

−1.8 / 0.3

−0.5 / 2.1

0.3 / 3.4

0.4 / 4.1

CFL40°

2.9 / 6.5

2.0 / 5.8

0.8 / 5.0

−0.5 / 3.8

−2.0 / 2.5

−3.6 / 1.0

CFL50°

8.0 / 7.7

5.9 / 6.0

3.4 / 3.8

0.4 / 1.3

−2.8 / -1.7

−6.3 / -4.9

CFL2

14.1 / -2.4

13.2 / -3.3

12.5 / -4.2

11.8 / -5.1

11.2 / -5.9

10.8 / -6.5

Average

4.5 ± 7.4 / -0.7 ± 7.6

4.5 ± 6.2 / -0.4 ± 6.3

4.3 ± 5.5 / -0.4 ± 5.1

3.9 ± 5.7 / -0.7 ± 4.3

3.2 ± 6.6 / -1.2 ± 4.1

2.4 ± 7.9/ -1.9 ± 4.4