Disclosed is a chiropractic instrument capable of achieving the benefits of algorithmic pre-stretch, power-stretch, and recoil and release in reciprocating therapy to human tissue. In particular, that application teaches a plunging-probing technique wherein a barrage of power-stretch impulses is added to a time-modulated ramp of increasing and decreasing stretches, while offering an inherent safety-limit which prevents, upon operator error force, beyond the max given on its label, while providing meaningful tactile feedback to the practitioner. The new idea yields tethered reproducible power-stretches which only occur concurrently with achieving precise, variable, and preset levels of tissue pre-stretch force.
