RSI refers to Repetitive Stress Injury. You see the word 'repetitive' there? So, it has to come with anything that you repeatedly do. No matter wrist, ankle, elbow, knee!
But then, if you think a bit more, the strength we have in our extremities is different from each other. Said that, by nature, legs are stronger than hands. Extending this further, toes ...
When you browse through Pubmed, there are two articles which provide some insights for your question:
Shah U, Mandl L, Mertelsmann-Voss C, et al. Systemic lupus erythematosus is not a risk factor for poor outcomes after total hip and total knee arthroplasty. Lupus. 2015;24(9):900-908. doi:10.1177/0961203314566635. 1
They have done a case-control study ...
No one can diagnose your particular problem over the internet, not even with the superb picture you've provided us with.
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However, discussing osteomylitis and impetigo might help you.
It looks they are relevant according to these two researches:
Both soccer players and controls had genu varum. However, the
incidence of genu varum was higher in the soccer players (P = 0.0001)
and it was more prevalent in the 16-18 year age group (P = 0.0001).
The results revealed ...
The Maisonneuve fracture is a special form of the Weber C fracture. What makes it special is that the fracture of the fibula has to be localized within the proximal third of the fibula shaft (see "The Maisonneuve fracture is a spiral fracture of the proximal third of the fibula", http://www.ncbi.nlm.nih.gov/pubmed/23079149). Weber C includes all ...