Parkinson’s can cause stiffness/ heaviness in legs but is unlikely to be responsible for sore legs. Knee replacement may be associated with complications that are likely to be confined to the joint. Sore, tired and stiff legs could occur due to a variety of reasons like neurological disorders, muscle weakness/ myopathy, vascular abnormalities, bone or joint degeneration/ inflammation, micronutrient deficiency, hormonal/ endocrine/ metabolic disorders etc. Without a clinical evaluation it would be difficult to determine the cause of your symptoms. It would be best to get this evaluated by a primary care physician. After a cause is suspected or diagnosed, it can be managed accordingly or specialist care may be sought.
Hope this helps.
The Content on this Site is presented in a summary fashion, and is intended to be used for educational and entertainment purposes only. It is not intended to be and should not be interpreted as medical advice or a diagnosis of any health or fitness problem, condition or disease; or a recommendation for a specific test, doctor, care provider, procedure, treatment plan, product, or course of action. Med Help International, Inc. is not a medical or healthcare provider and your use of this Site does not create a doctor / patient relationship. We disclaim all responsibility for the professional qualifications and licensing of, and services provided by, any physician or other health providers posting on or otherwise referred to on this Site and/or any Third Party Site. Never disregard the medical advice of your physician or health professional, or delay in seeking such advice, because of something you read on this Site. We offer this Site AS IS and without any warranties. By using this Site you agree to the following Terms and Conditions. If you think you may have a medical emergency, call your physician or 911 immediately.