Which type of hydrotherapy tank allows for leg extension but not full body immersion?

The correct choice is the lowboy tank. This type of hydrotherapy tank is specifically designed to accommodate patients who need access to water for therapeutic exercises while sitting or standing, allowing for leg extension without the necessity of full-body immersion. It typically has a lower height, making it easier for patients to enter and exit while still allowing for effective treatment of lower extremity conditions.

In contrast, the extremity tank is focused solely on the immersion of limbs and does not facilitate any form of leg extension outside of the water. The highboy tank is designed for full-body immersion and typically allows for various aquatic therapies, including exercises that require complete immersion. The Hubbard tank, on the other hand, is also specific to full-body immersion and usually caters to a different range of therapeutic needs and treatments.

Understanding these distinctions helps in selecting the appropriate equipment for specific rehabilitation goals in a physical therapy setting.