A lower back muscle strain, also known as lumbar muscle strain or lumbar strain, refers to an injury to the muscles of the lower back. This can occur when the muscles are stretched too far or torn, often due to sudden movements, lifting heavy objects improperly, or overuse. Here’s a detailed description:

1. Causes:

   • Sudden Movements: Quick or unexpected movements, such as twisting or bending, can strain the muscles in the lower back.
   • Heavy Lifting: Lifting heavy objects with improper technique or lifting objects that are too heavy for your fitness level can lead to muscle strain.
   • Poor Posture: Prolonged periods of poor posture, especially while sitting or standing, can contribute to muscle strain over time.
   • Overuse: Repeating certain movements or activities without adequate rest can lead to overuse and strain.

2. Symptoms:

   • Pain: The primary symptom is localized pain in the lower back. The pain may be sudden and sharp or develop gradually.
   • Muscle Spasms: Muscle spasms, or involuntary contractions of the muscles, may occur.