Hip flexor strain, tendonitis or tightness; what the symptoms are, possible causes, how you can alleviate pain and prevent recurrence.
Psoas and Hip Flexor Injuries in Runners: Signs, Symptoms and
Why your hip flexors are tight and how to release them
IYCA - The International Youth Conditioning Association : Training
IYCA - The International Youth Conditioning Association : Training
Running: It's All in The Hips Running techniques, Hip flexor
Hip flexor pain running
Best Exercises For Hip Flexor Pain - From a Physical Therapist
Tight hip flexors in runners: symptoms, prevention, cure – how to
Hip Flexor Tightness in Distance Runners - Athletico
PDF) Effects of Hip Flexor Training on Sprint, Shuttle Run, and