Of course, you know what it feels like to have a tight muscle. But tight hips aren't just uncomfortable—they can lead to all sorts of other aches and pains, especially in the lower back. "People focus on the hips and say their hips are tight, but we don't always think about the fact that the lower back connects to our legs at the hip," Charlee Atkins, C.S.C.S., instructor at Soul Annex in New York City and creator of Le Stretch class, tells SELF. Tight hip flexors make it harder for your pelvis to rotate properly, which can cause your lower back to overcompensate, "and this can be a setup for lower-back injury," Teo Mendez, M.D., an orthopedic surgeon at NY Orthopedics who focuses on operative and non-operative management of sports-related injuries, musculoskeletal injuries, and arthritis, tells SELF.
Keep it a one joint stretch. Many people want to jump right to performing a hip flexor stretch while flexing the knee. This incorporates the rectus and the psoas, but I find far too many people can not appropriately perform this stretch. They will compensate, usually by stretching their anterior capsule too much or hyperextending their lumbar spine.
Meanwhile, many non-dangerous problems can cause amazingly severe back pain. A muscle cramp is a good analogy — just think about how painful a Charley horse is! Regardless of what’s actually going on in there, muscle pain is probably the main thing that back pain patients are feeling. The phenomenon of trigger points — tiny muscle cramps, basically11 — could be the entire problem, or a complication that’s more painful and persistent than the original problem. It’s hard to overstate how painful trigger points can be, but they are not dangerous to anything but your comfort.
A sedentary lifestyle can lead to having weak and tight hip flexors as they are always in the shortened position. Tight hip flexors can lead to a limited range of motion, poor posture, lower back and hip pain, and even injuries. These muscles need to get a workout when you are standing and doing movements such as raising your leg to climb stairs, run, or ride a bicycle.