A muscle strain is an injury that can happen due to overuse. Sudden forces can also cause acute muscle strain injuries. Twisting motions, for instance, can cause acute back strains. A common location for muscle strains is the lower back. In addition to causing sudden pain and lingering soreness, muscle strains can also cause painful back spasms.
https://www.verywellhealth.com/crippling-back-spasms-5100895