Abstract: A desk chair has a sitting component, a headrest component adjoined to the sitting component and rotational relative to the sitting component, and a left armrest component and a right armrest component both adjoined to the sitting component and rotational relative to the sitting component. The sitting component seats a user of the desk chair and includes a reclining mechanism to enable a user to perform stretching and strengthening exercises for the abdomen of the user. The headrest component supports the head of a user of the desk chair and enables the user to perform stretching and strengthening exercises for the neck of the user. The left armrest component and the right armrest component support the arms of the user of the desk chair and enable the user to perform stretching and strengthening exercises for the chest, back, shoulders, arms and/or abdomen of the user. The user can also utilize the reclining mechanism to increase or decrease the range of motion of an exercise for the user.