Place one foot on middle of exercise band with ends looped on wide dip bars. Push band down partially by extending leg. Mount dip bar with oblique grip (bar diagonal under palm), arms straight, and shoulders above hands. Place other foot on exercise band next to other foot. Bend knees and hips slightly.
Lower body by bending arms, allowing elbows to flare out to sides. When slight stretch is felt in chest or shoulders, push body up until arms are straight. Repeat.
Also see Band-assisted Triceps Dip.
To decrease difficulty, use thicker band or perform other assisted version of this exercise.
To increase difficulty, use thinner band or place bent knees onto band. After some time, finally progress to Chest Dips without assistance.