Often people go to the doctor seeking help for hip pain. Sometimes, people try to treat it themselves. They are convinced there is something wrong with their hip and the treatments begin. However, one thing is for sure, hip pain is not always as it appears. Hip pain can be a result of a problem in the hip joint itself. However, it can also be a result of a back problem or a soft tissue problem around the hip region.

Place a mini band around your ankles and spread your feet about shoulder-width apart. Keeping your legs relatively straight (you want the motion to come from your hips) and toes pointing forward, walk forward 10 steps, then backward 10 steps. Take a short break and then walk to the right 10 steps, then to the left 10 steps. Again, focus on keeping your legs straight and toes pointing forward.
The side of the pain on its own doesn’t tell us much, and most of the one-sided sources of pain are viscera that usually cause abdominal pain instead of back pain, or in addition to it. In other words, the only reason to worry about right or left lower back pain is if it is otherwise worrisome: if you have other red flags or significant non-back symptoms.
Good points on isolating the single joint hip flexors and avoiding compensations. I am curious about your perspective (and others) on why this is less likely to stress the anterior capsule? I tend to add trunk side ending before finalizing the stretch to bias the psoas. The stretch you have outlined seems like an iliacus and ant. capsule biased stretch. Thoughts? If I really want to protect the anterior capsule, I’ll also add a slight amount of hip internal rotation.
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.​