Pain in the lower left back could indicate a problem with the muscles, joints, mid-back, or organs in the pelvic area. Common sources of pain include muscle injuries, kidney problems, and arthritis.

One-sided back and hip pain can occur on the left or right side ... repetitive movements damage muscles over time. Stressful, repetitive motions can cause the low-back muscles to become stiff ...

Your journey to getting shredded doesn't involve just situps and planks. Your midsection can power so much more.

Here's why this muscle deserves more attention—and how to strengthen it. Lower back pain is often blamed on posture or pulled muscles—but the real cause may be deeper. Experts point to a deep ...

Bend the left leg closer into the body and ... This stretch lengthens the spine, easing lower back pain and targeting hip muscles in addition to muscles in the pelvic floor. A person usually ...