So I have an 18 year old Arab mare. Rough ride she is. Good at the walk - fast, ground covering most of the time unless it's a lazy day. She is very rough at the trot. Husband even thinks so but he can post on her and she's fine with it. I post on her and she will either turn around and look at me or pin her ears sometimes. She's telling me something! If I stand in the stirrups while trotting, she's fine. I will sit her slow trot going downhill (not steep hills but not completely flat) and we are both comfortable. On the flat, I can't figure her out. She's fine with me standing in the stirrups and riding jockey style but I know I'm leaning forward! I try and post on her like I did with all my others who were all SMOOTH! And it just doesn't work for us 2. My dixiemidnight pad has started to come apart at the back end. I know these things are guaranteed for life. I talked to the owner and his first question was - do you post when you trot? YES. He said, 'that's the problem. You NEED to sit the trot no matter what. Otherwise your saddle is moving back and forth even tho you don't think it's moving and it will wear out the pad and you're not riding centered on the horse." During our long conversation.... he said the endurance riders love these pads. YES - I used to be one! And that's when I got my pads. I only trail ride now but... I never saw an endurance rider NOT post. Unless they were on a gaited horse. So..... i don't think I believe his theory. So I have I guess 2 questions.... is this what really caused my pad to fall apart only at the back??? And is it better on the horse to post or sit a trot? I have NO problem riding my husband's horse in a trot - she's SO smooth and my 28 year old (who I lost to colic several months ago - sadly) was a GREAT smooth gal and I had no issues posting on her. But my jackhammer..... I"m trying to figure out how to ride her at the trot. She sees the chiropractor a few times during the riding season. Nothing out of the ordinary.