The Role of Muscle Strength in the Sit-to-Stand Task in Parkinson’s Disease

Figure 1

The STS task in Parkinson’s disease. (a, b) Increased compensatory trunk flexion, patients tend to sit down near the border of a chair. (c, d) Patients show increased velocity during the rising stage, increasing the forward instability but decreasing backward instability.

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(b)

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(d)