Hi Nicki- PT for gymnasts here 👋 where is the hip pain? If it’s groin pain with any type of straddle movements I’d make sure to focus on a lot of soft tissue work to the inner thighs- foam rolling and proper stretching- and some end range adductor strength. Glute and core work too, and making sure you’re in a neutral spine when taking off for cartwheels and roundoffs (as opposed to being arched and loose in the core)