There is an increasing awareness that horse and rider should not be asymmetric. The ever expanding research in balance, biomechanics, and musculoskeletal impact upon the horse and rider combination is vast. Training horses to move freely without the riders influencing movement & freedom is a hard task. Professional trainers and coaches http://www.horsescout.co.uk/professionalswill be able to help you identify which rein your restricted on, this is very important in the both the horses and your own development with flatwork and jumping respectively . Horses with one sided development often present with an ‘unstraightness’ during jumping exercises. Until straightness can be achieved the horse and rider should be careful not to focus on height , but quality of the canter , replicability of the jump & straightness.