Cord fly with toning tube exercise targets your upper body, shoulders, chest, back and arms. Toning tube exercises are beneficial for building muscles. They work on multiple muscles and joints at a time. They can be used for a number of workouts with a variety of resistance levels that allows you to choose as per your fitness level. Cord fly exercise helps in strengthening your major upper body muscles. It is advisable to discontinue the workout if feels pain or discomfort and consult your doctor immediately.