The Science

Not only does The YiPP give you amazing stability and support with your postures, it also causes a physiological response called Reciprocal Inhibition. Reciprocal inhibition describes the process of muscles on one side of a joint relaxing to accommodate contraction on the other side of that joint. Joints are controlled by two opposing sets of muscles, extensors and flexors, which must work in synchrony for smooth movement. When a muscle spindle is stretched and the stretch reflex is activated, the opposing muscle group must be inhibited to prevent it from working against the resulting contraction of the homonyous muscle. This inhibition is accomplished by the actions of an inhibitory inter-neuron in the spinal cord. In a nutshell, when one muscle, or a set of muscles contracts, the antagonistic (opposite) muscle, or set of muscles, relaxes. Take the seated forward bend…

the science

Now…for those of us with very tight hamstrings, we work practice after practice to get them to open. We use focus, breathing, and just a good stretch. With The YiPP we have more. By pressing The YiPP into flexed feet, the core, the quadriceps, and the shin muscles contract automatically, thereby causing a relaxation in the lower back (core), the hamstrings (quadriceps), and the calf muscles (shin). With the ‘front of the body’ contracted, the ‘back of the body’ must relax just due to physiological principle. For more examples of this, see The Story and The YiPP TiP.

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