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Welcome to “The Kinetic LiNK” (K-LiNK) is Functional Free Motion Resistance 


The principles behind The Kinetic LiNK are largely associated with the kinetic link principle.  The principle that body segments generate high end-point velocity by accelerating and decelerating adjacent links, using internal and external muscle torques applied to the body segments in a sequential manner from proximal to distal, from massive to least massive, and from the most fixed point to the most free point.


The kinetic link principle is applied when different body segments rotate during throwing, sprinting, bounding, and kicking. These actions have been likened to the motion of a bullwhip. If segmental rotations are free to occur at the distal end, the body's base-segments in contact with the ground act like the handle of a bull-whip. Just as the tip of the bullwhip can be made to travel at supersonic speed, the small distal segments of the hand and foot can be made to travel very fast by the sequential acceleration and deceleration of the body segments once resistance is applied throughout motion.


About The Inventor


Rephel Martin is the inventor and creator of “Function FreeMotion Resistance Training” and “The K-Link”.  The innovation behind the K-LiNK was to create an environment to allow athletes to teach themselves what “IT” feels like while adding specific resistance but not restriction to athletic movement.  “IT” is the link between feeling the movement happen and understanding what these sports specific movements translate into.    

The Dover, New Jersey native competed in Track and Field at UNC-Charlotte, where he excelled in the long jump and triple jump. While at Charlotte, He earned All-America notice in the triple jump at the 2000 NCAA Outdoor Championships and earned All-Conference USA honors eight times in the long jump, triple jump and 55m dash. He is a two-time conference champion in the long jump and three-time triple jump conference champion, and was selected Conference USA Indoor Athlete of the Year in 2000, and Charlotte indoor and outdoor team MVP in 2000. Rephel also competed at the USATF national championship level in both the long and the triple jump.  

Martin currently holds the Conf-USA record in the long jump at 26’5” (8.05m), and recorded a personal best 53’9” in the triple jump, and 6.37 seconds in the 55-meter dash. Martin has earned USATF level one coaching certification, USTFCCCA Combined Events certification, and is AFAA personal training certified.



Collegiate Athletic Achievements


  • 2000 NCAA All-American in the triple jump (16.17m, ranked seventh nationally)

  • Conference USA Male Athlete of the Year (2000)

  • Two-time Penn Relays winner in the triple and long jump

  • Five-time Conference USA champion

  • Current Conference USA record holder in the long jump (26’ 5”)

  • 2004 Olympic Trials qualifier

  • Fourth place in the triple jump at the 2000 USATF National Indoor Championships

  • Tenth place in the triple jump at the 2001 USATF National Outdoor Championships


Personal Records

Long jump           26’ 5” (8.05m)

Triple jump         53’ 6.5” (16.32m)

55m dash             6.37

100m dash          10.67

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