Not just riding!
I just finished a winter in-home training via online coaching with a former derbyist Sarah Cuthbertson. She has a fantastic program for those who are serious about being fit for riding. I have always stated that anyone can ride, but, if you want to excel at riding, you must be willing to get fit. The best part about Sarah's program is she gives so many great video's on different areas you can improve and tailor it to your needs - really important for those of us in the "older athlete" era! Here is a link to her website: https://ridelikeanathlete.com/