The hip rotators not only rotate the thigh on the pelvis but more functionally rotate the pelvis on the weight bearing fixed thigh. Activities such as swing a golf club, and even just walking require some rotation of the pelvis on the weight bearing leg.  While we don't need that much range of motion to walk, activities such as running, dancing, tennis, and many other sports can require more hip rotation.
"As compared to a conventional deadlift, the sumo allows for greater recruitment of the adductors and a more stabilizing emphasis for the abductors," says Lindsey Cormack, a competitive powerlifter and CrossFit trainer. "Training sumo may feel less stable at first, but the balance requirement is what allows you to effectively train both the abductors and adductors."
Enthoven WT, Geuze J, Scheele J, et al. Prevalence and "Red Flags" Regarding Specified Causes of Back Pain in Older Adults Presenting in General Practice. Phys Ther. 2016 Mar;96(3):305–12. PubMed #26183589. How many cases of back pain in older adults have a serious underlying cause? Only about 6% … but 5% of those are fractures (which are serious, but they aren’t cancer either). The 1% is divided amongst all other serious causes. In this study of 669 patients, a vertebral fracture was found in 33 of them, and the chances of this diagnosis was higher in older patients with more intense pain in the upper back, and (duh) trauma. BACK TO TEXT
Obtaining an accurate diagnosis is the first step to resuming activities and living an active lifestyle. Let's discuss the reasons for confusion and see if we can realize the causes and treatments for both hip and back pain. Some of a patient's misunderstanding about the origin of the pain is due to not understanding hip and back anatomy. Sounds odd but it's true. The hip joint lies just behind the groin area on each side of the body. At the same time, the spine runs from the base of the skull to the tip of the tailbone. The lumbar spine contains specific nerves that can influence the feelings in the region around the hip area.
So if you're doing abs exercises and you feel like your hip flexors are putting in more work, refocus and dial in on the muscles you're trying to target. It might sound trite to just "think" about a muscle working as you're doing an exercise (for example, thinking about your abs contracting as you do a situp), but it might actually prevent you from mindlessly grinding out reps with poor form.
• Osteoarthritis. The most common form of arthritis of the back, osteoarthritis is a chronic condition characterized by the breakdown of the cartilage that cushions the ends of the bones where they meet to form joints. In the spine, this breakdown occurs in the cartilage of the facet joints, where the vertebrae join. As a result, movement of the bones can cause irritation, further damage and the formation of bony outgrowths called spurs. These spurs can press on nerves, causing pain. New bone formation can also lead to narrowing of the spinal canal, known as spinal stenosis.
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.​