A method of conditioning a soft tissue region or site of a patient prior to, during or after a fat grafting procedure, or any combination of these, has the steps of: activating an ultrasonic or acoustic shock wave generator or source to emit ultrasonic or acoustic shock waves; subjecting the soft tissue region or site to ultrasonic or acoustic shock waves stimulating the said soft tissue; wherein the emitted waves are focused or unfocused low energy acoustic shock waves or ultrasonic waves and wherein the soft tissue region or site underlies the patient's skin. The soft tissue region or site is one of a buttock, a breast or a scalp. The method of conditioning a soft tissue region or site further has the step of: treating the soft tissue region or site after conditioning and implanting or injecting viable fat cells in a fat grafting procedure.