If your hips are killing you, you probably spend a lot of time sitting—in the car, at work, on that SoulCycle seat—which puts your hips in near-constant "flexion", says Cori Lefkowith, NASM-certified personal trainer and owner of Redefining Strength in Orange County, California. Even running involves a repetitive flexion movement that can cause pain.
How to do it: Rest the barbell across the upper traps on the back of your shoulders, as if it’s sitting on the collar of your shirt. Begin with your feet about shoulder-width apart, toes pointing about 15 degrees out, then widen your stance as needed so you’re comfortable. Make sure your knees are pushed out and your glutes stabilize your position. When you’re ready, push your glutes back as if you’re sitting in a chair. Aim for dipping your butt below your knees, but go down as far as you can without bending forward or losing balance. When you get the bottom of your squat, squeeze your glutes and drive up and through your heels back to start position.
You can strain or tear one or more of your hip flexors when you make sudden movements such as changing directions while running or kicking. Sports and athletic activities where this is likely to occur include running, football, soccer, martial arts, dancing, and hockey. In everyday life, you can strain a hip flexor when you slip and fall, for example.