For our group jumping lesson we learned the technical side of adjusting our body position for going up hill and down dale. It's about leaning forward and holding onto mane when going up hill. Lean back and kick your feet forward for going down dale. Ultimately you want to maintain your body position as balanced and upright regardless of what the horses body is doing beneath you.
I have been a Professional Animal Communicator since January 2016. I have been an animal lover and admirer for a very, very long time.