NORTHVALE, N.J.--(BUSINESS WIRE)--Ivivi Technologies, Inc. (AMEX: II) reported that research published in a recent issue of The Journal of Hand Surgery entitled “Pulsed Magnetic Field Therapy Increases Tensile Strength in Rat Achilles’ Tendon Repair Model” has shown that Ivivi’s recently developed noninvasive pulsed radio frequency electromagnetic fields (PEMF) can produce up to a 69% increase in rat Achilles’ tendon breaking strength versus control tendons at 21 days after repair.