Support... Having people around you that encourage you and care about positive outcomes. I was extremely fortunate to have an immediate family that was horse crazy while I was growing up. The going joke is that they brought me home from the hospital and put me on a horse. Though that's not true, it is true that I rode before I walked, and I spent copious amounts of time on the back of a horse with my mother. I suppose you could say that horses have been ingrained in my essence. Of course, I did what most kids who grow up with horses in their family as a business do, and defected for about three years (13-16), but came back to it when I got my heart horse, Angel, at 16.
I'm not trying to brag about my accomplishments here, but I have ridden lots of green horses, I have started two from scratch (Angel and Bronwyn) and done all of the riding on them myself (under the guidance of my mother). Never in my life did my parents ever say "You're too big for that horse." or "Pfft! Aren't you a little... ahem... unfit to be riding?", or any of the other various hurtful and nasty things that some families, for some reason, seem to be inspired to say to one another when extra pounds are in the mix. In fact, my parents have encouraged me to ride horses that I felt that I was too big for, insisting that what I was doing wasn't going to hurt the horse. They have never encouraged me to do anything unrealistic and every time I have wanted to do something new that might not be in my repertoire, they have always done their best to help me make it happen.
If you have to explain how much it means to your family and friends to be able to ride, to make time for your horses, and the freedom you feel on horseback, do it. I think sometimes people don't understand the value of horses to people they care about. They think "Oh, it's just a passing fad...". The extra bonus is if you have family members nagging you about losing weight, you can tell them what a great workout horseback riding is and that if they are so concerned about your weight loss, they would pay half of your lessons to help you lose some! :)
After I lost my Angel and gained back many of the 40lbs I had lost while riding her while I refrained from riding for almost a year, I got Bronwyn. Since she was green and I knew I wanted to do the riding on her myself, I decided to prepare myself by taking lessons from a riding instructor I had known most of my life. My mother could have taught me but at the time all we had were green horses and I wanted the chance to sit on a plodder and figure out my balance, posture and position again so I would do more good than harm to Bronwyn.

It's daunting, especially if you don't have the benefit of an old friend who has known you practically your entire life, or have to go to a complete stranger to take lessons. The most important thing in selecting an instructor is finding one who will also recognize your limitations but not allow them to defeat you. They WILL find a horse that is a right match for you (frankly, I would want to fill my entire lesson barn with horses that are suitable matches for plus sized riders because they're also suitable matches for "average sized" riders, too!), they WILL tailor their lesson program to accommodate for any unfitness or other challenges you may have. They WILL sit down and talk to you seriously about your goals, understand them and encourage you. If your dream is to ride a dressage test, jump 2'6", or win a western pleasure class, they shouldn't laugh at you or even hesitate in encouraging you. If they do - leave and leave fast - those are not the type of horse people you want to associate with. It might take a few visits to a few barns and you might be a little embarrassed when you lay all your cards out on the table... but you know what? When you find the right coach... you'll know. And it will 100% improve the experience.
As for the bra... I can't give any advice. I hope someone in the comments can shed some light on an affordable bra that really holds you in. Unfortunately, I am "blessed" (cough) with very large breasts and I typically wear a regular support bra with a much-too-small sports bra over top. I end up with red lines all over me. I have heard good things about the ENell sports bra (the one Oprah endorsed, perhaps?), but am hesitant to spend that much money unless I know it's going to work!
Things You Should Comment On In The Comments!
What other things would you like to see us offer? Resources wise, entry wise, etc? (I am working on something to do with tack fit, and am toying with a plus sized clothing for riders option - would love some links for that if anyone has them!)
Found the perfect bra? Let me know!
Places I can list the blog in directories, etc, to promote it a little more.
Anyone interested in putting buttons on their website with a link to the blog?
While the blog in no way is a weight loss blog for plus sized riders, I am considering talking about my weight loss journey. Would anyone find this offensive or of poor taste for the "A Fat Girl..." blog? With that said - I am always going to be in the plus sized range no matter what I do - so don't worry about it taking away from the title!
Coming Soon!
I am putting together another awesome entry featuring the photos and stories of plus sized riders on NON DRAFT horses! If you are a plus sized rider riding a NON DRAFT, send me an email with photos and your story so I can post them up! :) seeking(dot)sendiri(at)gmail(dot)com.
A guest entry discussing the importance of good tack fit for your horse!
And before too long, a huge rant about how disgusting Canadian weather can be!