160 patients with moderate to severe acute or exacerbations of chronic low back pain presenting for chiropractic and rehabilitation care will be randomized to one of two conditions: a pain relief belt device incorporating multiple speeds of vibration and optional heat, cold, and pressure delivered through a sculpted metal plate; or an 8 channel prescription TENS unit. Patients will be prompted by a Qualtrics text link to a secure data recording site collecting pain and medication use.
