L – IS FOR LATERAL and LOOSENESS
Looseness is the essential aim of the preliminary training phrase and by this I mean relaxation of all of the joints and muscles. Only when your horse is supple can he create impulsion, be straight and have balance with a swinging back and self-carriage. Looseness is not achieved overnight, particularly if you have started with a horse that has a degree of stiffness anywhere in its body and/or legs. Laterally the horse should be able to bend his body from poll to tail without falling in on the shoulder or swinging out the haunches. The only means you have for acquiring lateral suppleness in your horse is lateral bending.
Longitudinally (length-wise), the horse’s joints should bend and straighten equally on each side of its body with each stride; he should be able to lengthen and shorten whilst maintaining rhythm.With supple muscles comes strength.