How do you get a horse to change leads

my horse just turned four and i love her to death i have trained her myself and this fall and next summer im going to be entering her in events i want to barrel race her and it is key to have your horse on the write lead to go around the barrel im just not that sure how to make her change her lead?

Bah. Simple question. No one will give you the correct answer because few horse people actually understand the mechanics of horses. You will learn, if you listen to my advice, that gaming horses are perhaps the most physically tuned horses and by far the best competitors, second only to reining horses. First thing: your horse is too young to be asked for speed. When you show next year, you should ask for correctness. Speed will follow. It is absolutely key to have your horse on the right lead around a barrel. How does one accomplish this? Well anyone with any brains should know that all leads come from the hip. This is why ex-reiners make fantastic barrel horses; because they have stellar hip movement. Teaching your horse to move her hip is the basis of barrel racing. If you ride a horse with a solid hip, it will not drop shoudler, it will properly change leads, it will not run off. A horse with a hip will run correctly, consistently, and competitively. Horses with hips learn to curve around barrels with their shoulders lifted. Not to mention you will blow people away with your amazing ability to cue flying lead changes every two strides. Okay, sounds great. How do we acheive hip?