We certainly proposed ambidexterity as a major gymnastic goal for our horses.  The essential reason for this is often forgotten, a horse needs to be ambidextrous to help him be more balanced, proficient in his skills and lengthening his work career. It will also aid in him be more comfortable because there is less strain upon his body.

However, it does not seem to occur to most riders that the same applies to them.  People are built very differently on each side of their body.  Most of us are certainly right- or left – handed, and the rest of our body usually follows suit.  As a result of this one side of our body predominates our musculoskeletal progress allowing us to develop unevenly… 

Metaphorical speaking:

Picture a bowler, he starts toward the line with his ball in his right hand, he goes to release the ball, as he does he swings his right arm back, bends over and picks up his right foot as he throws.  So, the entire right side of his body moves fluidly and the left side of his body is doing nothing?  No, the entire left side of body is supporting his whole body while the right side of his body is bowling. 

Some of the daily activities that we do add to this problem like sitting at a desk all day at work, as well as never changing how we sit/face to work on the computer or phone, or driving long distances.

Rider Lopsidedness effects their performance, weight, skills, and communication abilities with the horse.