** 1. After an injury, the knee is never normal. thus for expert guidance kindly consult an orthopedic Surgeon or Sport Medicine Specialist for necessary instructions and rehabilitation 2. The heat of a sun bed can increased the flow of blood through the skin, diverting blood from the main vessels and reducing the pressure in them and may cause postural hypotension, otherwise you can use it without any hitch. 3. You can Practice Utkatasan (chair pose),Trikonasan (triangle pose), Utthita Parsvakonasan (extended side angle pose) to strengthen your Knees,thighs, hips and ankles but only after consulting. 4. If your knee takes a while to heal, see a doctor, so that it is professionally treated