The piriformis muscle connects the top of the femur to the spine, and it’s the main one that supports the outward movement of the hip, upper leg, and foot. The sciatic nerve can sometimes pass through this muscle and thus cause sciatica symptoms, otherwise known as piriformis syndrome, characterized by pain in the lower back and hips, poor movement, and balance. Therefore, the main cause of sciatica is the swelling or constriction of the piriformis muscle, but it can also be a result of some other factors as well.
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.