Hip flexors are one of those things runners love to blame. Tight hips. Short strides. Low back pain. Fexors are rarely the only issue, they play a meaningful role in how we run and how problems can start to show up. The hip flexors are a group of muscles that help advance the leg during running. After your foot leaves the ground, they help bring the thigh forward so you can take your next step. They also assist with pelvic and trunk control, helping manage the forces that tra