When intervertebral disks collapse and osteoarthritis develops, your body may respond by growing new bone in your facet joints to help support the vertebrae. Over time, this bone overgrowth (called spurs) can lead to a narrowing of the spinal canal. Osteoarthritis can also cause the ligaments that connect vertebrae to thicken, which can narrow the spinal canal.
Tight hip flexors can also make it harder for your glutes to activate—since they're opposing muscle groups, when one is really tight the other becomes lengthened. When a muscle is more lengthened than it should be, it takes away some of its ability to contract. When your glutes are in this compromised position, it can cause other muscles to do more work than they should, making your workouts less efficient and sometimes, increasing your risk of injury.
Foraminotomy is an operation that “cleans out” or enlarges the bony hole (foramen) where a nerve root exits the spinal canal. Bulging discs or joints thickened with age can cause narrowing of the space through which the spinal nerve exits and can press on the nerve, resulting in pain, numbness, and weakness in an arm or leg. Small pieces of bone over the nerve are removed through a small slit, allowing the surgeon to cut away the blockage and relieve pressure on the nerve.
But moving is important for hip and knee OA. It causes your joints to compress and release, bringing blood flow, nutrients, and oxygen into the cartilage. “This can help prolong the function and longevity of your joints,” says Eric Robertson, DPT, a physical therapist and associate professor of clinical physical therapy at the University of Southern California.
Disk tear. Small tears to the outer part of the disk (annulus) sometimes occur with aging. Some people with disk tears have no pain at all. Others can have pain that lasts for weeks, months, or even longer. A small number of people may develop constant pain that lasts for years and is quite disabling. Why some people have pain and others do not is not well understood.
Talmage, J; Belcourt, R; Galper, J; et al. (2011). "Low back disorders". In Kurt T. Hegmann. Occupational medicine practice guidelines : evaluation and management of common health problems and functional recovery in workers (3rd ed.). Elk Grove Village, IL: American College of Occupational and Environmental Medicine. pp. 336, 373, 376–377. ISBN 978-0615452272. 
There are many tendons located around the hip that connect the muscles to the joint. With various activities or overuse, these tendons can become inflamed. This inflammation results in pain around the hip region. Iliotibial band syndrome is one of the most common causes of tendonitis at the hip joint. The hallmark of this condition is pain on the lateral, or outside, aspect of your hip.
When you're working to strengthen the core, you'll want to focus on exercises that don't exacerbate lower back issues. "It's important to find out which movements (flexion, extension, rotation) cause pain or discomfort and to avoid those movements, while continuing to work into ranges that are not provoking," Dircksen says. Crockford suggests focusing on exercises that keep the core stable and avoiding twisting movements to avoid exacerbating pain.
Lie on your back with your knees bent and your feet flat on the floor. Tighten your buttocks and lift your hips off the floor. Tighten your abdominal muscles and lift one foot a couple of inches off the floor. Then put it down and lift the other foot a couple of inches, all while remembering to breathe. “It’s like taking alternate steps,” Pariser says. Work up to doing 30 steps at a time.
Why is back pain still a huge problem? Maybe this: “It is extremely difficult to alter the potentially disabling belief among the lay public that low back pain has a structural mechanical cause. An important reason for this is that this belief continues to be regularly reinforced by the conditions of care of a range of ‘hands-on’ providers, for whom idiosyncratic variations of that view are fundamental to their professional existence.”
