It is essential to assess functional arm use or goal-directed movement of the upper limb in neurorehabilitation.  Wearable sensors help in the continuous, uninterrupted, and objective measurement of arm movements in natural settings. This dataset contains wearable inertial measurement unit data from 15 participants (10 healthy and 5 hemiparetic individuals) while they perform 15 different activities of daily living wearing two wrist bands. Tasks included fine finger manipulation tasks like writing, using a mobile phone’s touchscreen, walking for patients in wheelchairs, etc.