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The fastest way to tune up your nervous system and get rapid and sensational improvements in straight line speed. Excellent for improving leg speed and reactive strength which shortens ground contact time, a crucial factor in speed development. The flexicord propels the back runner through with lightening assisted overspeed. Innovative safety features include: A nylon protective sleeve that securely wraps the flexicord to contain the rubber in the unlikely event of breakage. This ensures your to
