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The rapid eccentric isometric lunge is highly effective for improving and correcting sprinting and stride mechanics as it teaches the body proper stride positioning as well as optimal recruitment patterns associated with running form. Focus on using the arms to rapidly drive the body into position, decelerate before touching the ground, pause, then drive the arms again to explosively propel the body upwards out of the lunge.

Rapid Eccentric Isometrics (REIs) are an advanced proprietary training technique developed by Dr. Joel Seedman, which he uses to increase proprioceptive feedback from muscle spindles with the goal of improving performance and muscle function. REI’s also improve force development and stabilization as the muscles are forced to turn on rapidly to absorb high impact forces. REI's should only be used once proper form has been established with standard eccentric isometrics (EI’s).

Check out advancedhumanperformance.com for more information on Dr. Joel Seedman and his services.