In addition to the suppling benefits provided, basic lateral work helps the horse to understand that the rider's leg creates engagement of the hind legs, rather than merely speed.
Even the stiffest horse can reach around and bite at a fly on its rump. The neck is already one of the most supple areas of the horse's body, and does not need any further suppling. Horses are also naturally supple in the poll and jaw.
What we perceive as stiffness in these areas is simply tension and resistance to our aids. We must encourage the horse to relax in those areas, but should not attempt to "work" those areas to force suppleness. The horse primarily needs to become supple in the mid section of the body, between the withers and the croup. So that is the area you should focus on in your suppling work.
Always keep in mind which fences are "towards home" and which are "away from home" when walking your courses. Especially in regards to the in gate in the show jumping arena. But even on cross country the difference can be felt in some horses, especially when they have to leave their buddies behind in the warm up area! Many horses need a much more positive, encouraging ride when being asked to jump strange fences going away from home, the in gate, or their friends. This may sound pretty obvious, but I think many riders forget about it until they run into trouble!
If you attempt to shorten the reins before your horse is honestly thinking forward, he is likely to become even more stuck and behind your leg. Always get your horse thinking forward first!
"In the end it's very important to have a good partnership with the horse. That you know the horse and the horse knows the rider and you trust each other." ~ Michael Jung
"First thing I look at when I buy a horse is paces rather than breeding. Beautiful parents don’t always produce beautiful children. I’m not looking for the flashiest paces, but also the trainablility and rideability. How are you going to keep a big, flamboyant mover sound into Grand Prix? You want an easy mover." ~ Carl Hester
Allow with the reins when approaching a drop into water. Holding too much in the last strides can cause the horse to not use his body fully over the fence into the water - which can cause a stumble or fall on landing in the water.
Stiff shoulders can easily cause a rider to have tense, tight hands. To relax your shoulders, take a deep breath in, and exhale... looking for the feeling that your shoulders and elbows drop and become supple.
One of the horse's biggest evasions to suppling exercises, is that of moving his body laterally instead of bending. In other words, watch for the tendency to swing their haunches to the outside to avoid bend, like this "/", rather than this "(".
"Many parents want to be best friends with their kids and don't set clear boundaries. Children and horses will always push boundaries to do or not do what they want to do. When very definite boundaries are set they will respect them. I find with horse this usually starts on the ground with "my space, your space" ~ Susan Moessner
"I used to ride mostly Thoroughbreds. I don’t know if they’re more intelligent, but I find that they think for themselves a bit more than the warmbloods. With a warmblood I find I definitely have to do a lot more, and think a lot more for them. They don’t have the same instinct to get themselves out of trouble that Thoroughbreds do, particularly when they start to get tired." ~ Mark Todd
"Chipping in" and coming forward right to the base of a fence are two entirely different things. Horses will always produce the best jump when truly ridden forward to the base of the fence.
The sensitive type of horse is always aware of your breathing when you are riding them. Keeping your breathing calm and regular will give your horse confidence.
"Correctly understood, work on the lunge line is indispensable for rider and horse from the very beginning through the highest levels." ~ Egon von Neindorff
With an anxious horse that wants to rush, it can be helpful to very deliberately work in a tempo that is much slower than they are naturally offering you. Only when they have settled into a quiet, even rhythm... and are truly waiting for you, should you ask for more energy.
"In every sport, life goes in waves, up and down, keep rowing the boat and you’ll meet the next wave coming up, but don’t jump out of the boat!" ~ Chris Bartle
"If you ride and train for a living, have something else that you do. Don’t make this your whole life. The bad days - and there are always bad days - will eat you up and spit you out. Have something that you do that has nothing to do with horses, to help put yourself back together again." ~ Lauren Sprieser
"You need to produce a walk. So work at the walk as well as the trot and canter. Get a good feeling of the body working in the walk. The walk is a mirror of the training of the horse." ~ Christoph Hess
Horses that have first learned how to carry themselves properly in all 3 gaits while on the lunge line will usually have a much easier time learning how to carry themselves properly with a rider on board.
When schooling a green horse through any complex where the last element is a tricky jump (skinny, angle, corner, etc), it is smart, if possible, to school the last element first. This will set you up for success as you then jump through the whole complex, as your horse will be more likely to put his eye on and correctly read the jump coming out.
Studying riding theory will make you a better rider or trainer in many ways. Trainers need a knowledge base broad enough to enable them to apply the appropriate system for each horse/rider combination in front of them. Riders need to thoroughly understand what they are trying to do and WHY.
It is very hard to get a horse truly fit and strong by training in an arena only. You need to use a variety of different footing and terrain to build a strong athlete that will hold up to the rigors of Eventing.
"At the end of the day, it's the bending work that makes your horse straight. If you ride straight to ride straight, you end up with a stiff horse." ~ Lars Petersen
"With the bend on the circles and in movements like the travers, it is important to use as little inside rein as possible. If you need the inside rein, there is something wrong with the earlier work." ~ Christoph Hess
Think "uphill" in your trot and canter lengthenings. Yes, the horse should be allowed to lengthen its neck slightly into the lengthening. But you still want to feel like you are on a motorboat - nose up, butt down.
If you want to jump well, make sure you can consistently canter over poles on the ground in a smooth, balanced manner. I am always surprised how many riders are attempting to jump courses, yet they cannot nicely canter over a ground pole. It is simply a smart way to practice just about every single skill you need to jump well, while minimizing the stress on your horse's legs.
"The difference between an incorrectly compressed horse and a collected horse is that the collected horse can put his nose toward the ground (stretch) while staying round." ~ Nuno Oliveira This is SO important!