- Force. Exerting too much force on your back — such as by lifting or moving heavy objects — can cause injury.
- Repetition. Repeating certain movements can lead to muscle fatigue or injury.
- Posture. Slouching exaggerates your back’s natural curves, which can lead to muscle fatigue and injury.
Of course, certain medical conditions and lifestyle factors — such as obesity, sleeping position, poor physical condition, smoking and stress — also can contribute to back pain.