A study like this is important because it provides evidence-based proof that there is efficacy to the treatment technique known as nerve mobilization.
The anterior talofibular and calcaneofibular ligaments are connected and can be considered to be one structure: the lateral fibulotalocalcaneal ligament.
A proposed biomechanical explanation is that restricted ankle joint dorsiflexion directly results in overpronation of the foot, which causes internal rotation of the lower extremity, which strains the external/abductor musculature, which can then no longer prevent femoral adduction; hence genu valgus.
Once one joint/structure/tissue is injured, compensation patterns usually occur in which the individual offloads physical stress to other areas of the body. This would logically lead to an increased risk of use/overuse/misuse/abuse to these other areas, likely eventually leading to injury.
A study from Belgium also showed that the Achilles tendon displayed a twisted structure, with the greatest twisting found in the deep (anterior) layer of the tendon (lateral gastrocnemius and soleus).