Validity and Reliability of Calf Raise Tests in Patients With Achilles Tendon Rupture and Lateral Ankle Sprain

General Inclusion Criteria: * Signed informed consent * Aged 18-65 years * German or English speaking Inclusion Criteria: LAS individuals: Unilateral LAS 4-16 weeks post-injury diagnosed by a physician as LAS, supination trauma, ankle distortion or ligamentous ankle injury. ATR individuals: Unilateral ATR 6- 24 months post-injury/surgery (surgical or conservative treatment). Healthy controls: Matched to Patients by Group Level: Physical Activity, Age and Gender. Exclusion Criteria: LAS individuals: Medial Ligament injuries (Grade II or III) ATR individuals: Previous ATR General Exclusion Criteria: * Chronic Ankle Instability (defined by symptoms such as giving way, perceived instability and at least one LAS within the last 6 months) * Previous ATR * Other lower limb injury and/or surgery in the last year (e.g. fractures, ligament reconstructions or other conditions resulting in ≥ 6 months of sports inactivity) * Impaired motor function of the lower limb due to neurovascular or neurological diseases * Vestibular or visual disturbances * Or any other pathoanatomic abnormality that would affect motor performance (e.g. foot arthrodesis, toe amputation/missing toes or other conditions such as joint deformities, severe chronic pain).