I am a science writer, former massage therapist, and I was the assistant editor at ScienceBasedMedicine.org for several years. I have had my share of injuries and pain challenges as a runner and ultimate player. My wife and I live in downtown Vancouver, Canada. See my full bio and qualifications, or my blog, Writerly. You might run into me on Facebook or Twitter.
Along with these exercises, it's also important to do some supplementary exercises to work your hip's supporting muscles. You've probably heard of your shoulder's rotator cuff. Well, your hip also has a cuff, or a group of muscles that help stabilize and support movement. For these exercises, you'll need a mini-band, a longer thera-band or tubing (both are sold at many sporting goods stores, or can be purchased online), and a cable-column unit.
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.
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.