After spinal fusion, can i start running ?

Back fusion: Yes, but only after your physician tells you it is ok to return to running and instructs you on what and what you cannot do.

Yes: Typically, healing from a spine fusion reaches its maximum at 6 months. Beyond then, most patients can resume activities as tolerated per their symptoms. The treating surgeon has the best perspective of a patient's condition and should be consulted about allowable activities.