A hip-stretching device includes a mat having an upper surface. The mat is configured for placement on a support surface to support a back of a subject lying in a supine position on the upper surface of the mat. The hip-stretching device includes first and second pockets associated with the mat. The first and second pockets each have an opening configured to removably receive an inflatable bladder for selectively placing the inflatable bladder in one of the first and second pockets. The first and second pockets each position an inflatable bladder received therein under a hip area of the subject when the subject is lying in the supine position on the upper surface of the mat. Inflation of the inflatable bladder imparts a force to the hip area of the subject to elevate the hip area to provide a hip flexor stretch to the subject.
