ABSTRACT
Given the current disagreement on low back disorders' diagnostic classification, it is pertinent to discuss the issue of reported low back pain vs. low back injury. Pain in the low back regionmay originate from injured tissues (Deyo andWeinstein, 2001). It is also hypothesized that low back pain may occur due to biochemical alterations in the concentrations of lactic acid or due to pH alterations (Simmonds and Kumar, 1992). Injury causes pain, but injury may not be the only reason for reporting pain. Some investigators claim that low back pain is not caused by injury because, by definition, an injury precipitates at a specific time to a specific tissue, and low back pain hasmany times a gradual onset (Hall et al., 1998). However, considering the Cumulative Load Theory of musculoskeletal injury precipitation, an injury may occur gradually, even without an accident or unusual activity (Kumar, 2001).
