Abstract: A device for assisting with plank exercises includes an elongated main body having a first axial end, an oppositely disposed second axial end and opposite lateral side walls extending therebetween. The main body comprises at least two telescoping members that may be adjusted to vary the length of the main body and the corresponding degree of stress provided by the exercise. The device includes a support brace positioned in proximity to the first axial end and a base member positioned in proximity to the second axial end. An ankle support is mounted to or extends from the main body. A post extends outwardly from a top surface of the main body and may receive at least one circular weight. The device is oriented so that the support brace rests on the user's lower back and buttocks area and the anterior portions of a user's lower legs rest on the ankle support.