Cando® Inflatable Balls help improve balance, coordination, flexibility, and strength. Ideal for prevention and treatment, these balls offer an almost endless variety of clinical and recreational uses: Pediatric and NDT therapists use them as an aid for vestibular movement and equilibrium therapy. Fitness professionals use them as an aid for stretching and strength programs. They're also used by pregnant women in birthing classes and for people with bad backs. Balls may be under-inflated to give a soft, mushy feel or "over" - inflated for a firm, bouncy feel, and can support up to 600 pounds.