1. She has a good figure. She can boast that her chest muscles are beautiful and her abdominal muscles are sexy.
2. Her riding clothes are very suitable for her, and she can be praised for her taste.
She is a good rider, so to speak, she is an excellent rider.
She is brave and can be said to be an adventurer who dares to challenge herself.
She is very fashionable, so you can say that her riding clothes are very fashionable, or that her riding style is very individual.
Note: praise should be sincere, not hypocritical, and not too fancy. At the same time, we should respect her privacy and personal space.