Patent ID: 6955616

Claim:
An apparatus for modifying the stride of a baseball batter's swing motion, comprising: a stirrup sized for capturing a lower portion of a baseball batter's foremost ambulatory appendage; an elastomeric tethering strap comprising an end attached to said stirrup and an anchoring end connected to a substratum by means for releasably anchoring said tethering strap to said substratum affixed atop the ground surface, said strap sized for elastomerically tethering the baseball batter's captured appendage to said substratum, said elastomericity including biasing favoring the return of said strap to its original shorter length and providing elastomeric constraint essentially equally in all directions during elastomeric lengthening of said strap, said elastomeric constraint being insufficient to prevent the batter's foot from leaving said substratum; said releasable anchoring means releasing when said elastomeric constraint constitutes substantial destabilizing hindrance.