Young and healthy Group of People (18-50 years) without any pathology of the lower limb

Young and healthy patients with an operative treated fracture of the ankle (type Weber B)

Young and healthy patients with an operative treated fracture of the ankle (type Weber C or complex fracture)

To compare the results the investigators invite a healthy control group matching in age and gender with the intervention cohort. The control group is informed about the study and asked to participate in the outpatient clinic. In case of informed consent, the participants are invited to the study site. The participants undergo the same provocation test of the ankle, and are asked to complete the specific provocation test. In case of substantial underachievement in the provocation test (<60% of maximum) an X-Ray of both ankles in a.p. and lateral projection is performed. The aim is to radiologically analyse the ankles, and to rule out any morphological reasons for the above mentioned underperformance.

This outcome will be compared with a group of adults matching in terms of gender and age. Measured by:

- a specific ankle provocation test: Multiple sport test measuring possible movement of the ankle and tolerating stress simulating in sportive movement such as weight bearing, leg press tests etc.

The specific provocation test does not have a specific name, because it is self made.

This outcome will be compared with a group of adults matching in terms of gender and age. Measured by:

- three questionnaires (quality of life, possible movement, restrictions in daily life etc.)

- VAS: Visual analogue score 1-10

Explanation: 1 means almost no pain, 10 is the worst pain one can imagine

- Quality of life questionnaire

Explanation: The SF-36 consists of eight scaled scores, which are the weighted sums of the questions in their section. Each scale is directly transformed into a 0-100 scale on the assumption that each question carries equal weight. The lower the score the more disability. The higher the score the less disability i.e., a score of zero is equivalent to maximum disability and a score of 100 is equivalent to no disability. To calculate the scores it is necessary to purchase special software for the commercial version, but no special software is needed for the RAND-36 version. Pricing depends on the number of scores that the researcher needs to calculate.

specific provocation test in our department of physiotherapy supervised by a physiotherapist and one of the investigators. measure of weight bearing, jump on one feet, balance.