When I do a deep knee bend like a sumo squat I get a popping in the outside of my left knee. It feels like a big tendon or ligament is slipping per something. It isn’t painful peer se but I’m afraid if I do it a lot it will be. Is that a relatively common symptom for a guy with tight flexors, it bands, etc? Should I just push through it or have it checked out?

You might not think of too much cash as a source of pain, but a fat wallet can trigger piriformis syndrome. The condition can affect men who wear their wallet in the back pocket of their pants. This puts chronic pressure on the piriformis muscle and can aggravate the sciatic nerve over time. You can avoid this problem by keeping your wallet in a front pocket or jacket pocket.
The good news is that there are plenty of good hip stretches out there that you can do to relieve discomfort, decrease tightness, and increase mobility in your hips. Since your hips are involved in so many of the movements you make (both inside and outside of the gym) stretching them is a great way to keep them feeling good and ready to work for you. Add some of the 12 hip stretches Atkins demos below to the end of your workout, or spend 10 minutes each day just doing a few of them, to improve mobility in your hips.
Kidney pain, kidney stones, kidney failure, and advanced kidney infections can cause radiating lower back pain, especially pain that affects the lowest ribs in the back and higher buttock area. Kidney issues can also cause pain in the groin area and difficulty urinating. Groin pain in women, especially pregnant women, is a special concern and the patient should be taken to the ER immediately. If you think a kidney issue is causing your back pain, get to an ER—because once a kidney issue is advanced enough to cause back pain, it is usually quite serious.

• Spinal stenosis. Literally meaning "spinal narrowing," spinal stenosis can occur when changes in arthritis lead to bony overgrowth of the vertebrae and thickening of the ligaments. This can occur with osteoarthritis or ankylosing spondylitis. If a significant overgrowth occurs, it can cause the spinal column to narrow and press on the nerves housed within. Because the affected nerves have many functions, the condition may cause diverse problems in the lower body, including back pain, pain or numbness in the legs, constipation or urinary incontinence.

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Grade II (moderate): A larger tear in your muscle that makes it difficult to move and causes a moderate amount of pain, especially when you move the affected muscle, swelling, and tenderness. You may have 5 percent to 50 percent loss of function and you may be limping. You can't go back to sporting activities until the tear is completely healed. These injuries can take anywhere from a couple weeks to a few months to heal, depending on how bad they are.
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