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Numerous research studies have proven that training the eccentric phase of movement is an extremely effective way of improving strength, muscle growth, flexibility, and connective tissue resilience. Unfortunately conventional equipment cannot load the eccentric phase of movement without presenting a significant danger of injury. Unlike all other portable fitness devices, the Synapse® goes far beyond merely imitating the exercises that can be done in the gym. With its unique ability to safely load the eccentric phase of movement, the Synapse® is the next evolutionary step in training methods.