Pull Up Variations Apparatus: Wunda Chair Level: Intermediate Video Type: Workout Language: English Variations of the Pull Up on the Wunda Chair. Great way to strengthen the powerhouse and gain control and balance. Level: Intermediate Language: English This page is only available to members. Click here to try Authentic Pilates online for FREE for 14 days or log in if you are already a member. Leave a Reply Cancel replyYou must be logged in to post a comment.