One of my daughter's gymnastics teammates is competing pole vault this spring season for the first time. She excited about it.
I tend to pull up on the lower pedal, especially when climbing and that can lead to sore HF tendon insertion points. Also, weak VMO or general quad muscles weakness can cause soreness in the frontal hip area from pushing a big gear. Improper tracking of the knee through the pedal stroke can also exacerbate this. Cycling tightens the HF muscles and stretching is needed to keep them loose or, as mentioned above, can lead to lower back problems or piriformis/sciatic type pain.