From: Triggers for an episode of sudden onset low back pain: study protocol
Physical Factors | Hazardous manual tasks: |
 |    - tasks involving heavy loads; |
 |    - tasks involving awkward postures; |
 |    - tasks involving objects that could not be positioned close to the body; |
 |    - tasks involving live people or animals; |
 |    - tasks involving loads that are unstable, unbalanced or difficult to grasp or hold; |
 | Vigorous physical activity |
 | Moderate physical activity |
 | A slip/trip or fall |
 | Consumption of alcohol |
 | Sexual activity |
Psychological | Being distracted |
Factors | Being fatigued or tired |