It is hardddd. One of my motivators (I have several) but one of my absolutely biggest ones is the motivation that I am a rider. I want to be in good shape as a rider so I can achieve my goals in an easier fashion and ride more comfortably for both my horse and I. I feel like sometimes people think "oh riding a horse is super easy" but we riders know that it is DIFFICULT stuff. Know how tough you are as a rider and understand that working out is only going to make you stronger! Also, maybe you just aren't doing the right thing... For example some people love running, but me, I'm not a big fan of it. I wish I liked it, but I've found a lot of success and calories burnt with the stationary bike. So, everyone has their own thing. Experiment with different things or different exercises around the house (or barn hehe) to see what you like best. Remember, don't be afraid to mix it up.
God bless, englishaqh (: