Muscles can perform more positive work if they are actively stretched before being allowed to shorten during forceful muscle contraction. This pattern of muscle activation is called the “stretch-shorten cycle” and is defined by an eccentric-concentric sequence in which the active muscle is first lengthened and then shortened.

zenoLINK quantifies the stretch-shorten cycle or muscular loading pattern during the golf swing by measuring hips, shoulders and arms rotation and the relative differential between each. Using this technique all aspects of the loading pattern can be evaluated: magnitude of stretch, the velocity of stretch and the time is takes to transition from stretch to shorten.