The Science Behind the 3rd Foot Cane
More than just another cane, the 3rd Foot Cane has been developed to support the complex biological movement machine – the human body.
The human body is a biological movement machine designed to maintain a centralized center of gravity inside its base of support (hereinafter "BOS"). Skeletal bones of the body form the framework, while skeletal muscles move the framework. Tendons found at the ends of skeletal muscles attach the skeletal muscles to the skeletal bones and help maintain the postural alignment of the body. Ligaments attach bone to bone, and have a limited amount of flexibility in order to maintain the attachment of the skeletal bones in the framework.
The articulating bones of the body that form joints stay aligned and positioned properly using skeletal muscles, ligaments, tendons, and fascia. Locomotion that keeps the joints aligned as designed and inside the body's natural BOS also keeps the skeletal muscles and fascia strong and flexible, and helps the body produce synovial fluid. Synovial fluid lubricates, shock absorbs and reduces friction on joints. It also brings nutrients to joints and removes carbon dioxide and metabolic waste.
When the joints of the human body are in postural alignment during locomotion, the body stays within its BOS and maintains a low center of gravity (hereinafter "COG"). The upward support force from the BOS aligns with the downward force of gravity. The stability of the body during locomotion depends on the gravitational balance and stability of the arms and legs. Injury or movement of a joint outside of the body's natural BOS creates overloading or under loading to all other joints due to the redistribution of forces. Under loading or over loading of a joint or movement that causes hyper-extension of a joint or its supporting tissue can result in a loss of physical stability and postural alignment. Over time, repetitive movement that doesn't maintain the body's COG over its base can result in physical and functional disability. The Specific Adaptation to Imposed Demands ("SAID") principle states that the body will gradually adapt to stresses and overloads that it is subjected to. Wolff's Law states that bone function changes cause bone structure modification. Davis's Law states that soft tissue's tendency is to shorten and contract unless subject to frequent stretching; in other words, and to quote Dr. Davis, "use it or lose it." Hook's Law states that tissue strain is directly proportional to applied compressive or stretching stress so long as tissue elasticity is not exceeded.
“Over time, repetitive movement that doesn't maintain the body's center of gravity over its base can result in physical and functional disability.” – Linda Swerdlow