These crutches come in a few styles, the Smart Crutch articulates to easily stand and sit while using it. The In-Motion Crutch has a unique angled design and standard forearm crutches include a forearm cuff to keep the crutch in place Crutches are a type of walking aid that serve to increase the size of an individual's base of support. They transfer weight from the legs to the upper body and are often used by people who cannot use their legs to support their weight (from short-term injuries to lifelong disabilities).