We all have our own unique movements. Parkinson’s will affect some of these particular movements on its onset. If you’re someone who typically swings your arms as you walk, and you stopped doing so, then you may have an early symptom of the condition.  

What you’re experiencing is rigidity, which is the stiffness or tightness in your torso or limbs. This happens when your muscles stay tense rather than contracting and relaxing as they normally should. As a result, it prevents your arm from moving spontaneously. In the early onset of Parkinson’s, your doctor may sometimes misdiagnose you with an orthopedic impairment or arthritis and not recognize the symptom as rigidity.