Why does it matter where your toes are pointed? Truthfully, your toes
themselves don't really matter--what does matter is where your *leg* is
pointing.
What you want to do is softly wrap your legs around the horse, and have
a light contact with his body from your seat all the way to your ankle
or midcalf (depending on your and the horse's anatomy ;) ). In order to
keep your leg on the horse all the way down, you need to have your leg
pointed forward.
There are two reasons why you want to keep your leg on all of the
time:
You have a more secure seat when you have a stable base of
support. Your base of support is that whole area inside your leg, from
your thigh to your calf. Think about it this way: sitting on your
chair, reach your knees up until you are only sitting on your
seatbones. Your balance becomes much more precarious. Now lower your
legs so all of your thigh is on the seat as well (or as much will fit
on your chair). You're much more secure now, aren't you?
When you have your leg softly on the horse all the time, you can
just squeeze your calf in order to apply a leg aid. You may think that
keeping your leg on will make a jumpy horse go faster, but the truth
is that it's much easier for you and for the horse; most horses will
relax. The reason for this is that if you try to keep your leg off the
horse all the time, you will inevitably bump him, probably every step,
with your leg. Since he doesn't have any baseline (solid soft touch)
to go from, he will interpret every little touch as a signal to go
faster, including those accidental bumpings. If you keep your leg
softly on, and softly squeeze when you want to use your legs, you will
have much more control over how much you squeeze, and the horse will
be much more relaxed about your leg. You will also be more able to
keep your leg still, so it does not swing and keep nudging the horse.
Easygoing horses can often ignore an accidental leg tap or a swinging
leg, but more sensitive ones will be confused by it and try to respond
to it each time. And it's riding a more sensitive, more forward horse
that makes most people want to pull their leg OFF the horse's side.
Don't. :) Keep your leg softly on all of the time and it will make
using your leg much more easy and clear.
If your toes are pointed out, so is your leg. When your leg is pointed
out, then you have a big SPACE between your leg and the horse...see,
your knee isn't even on the horse at all.
Your ankle and heel will be resting on the horse's side; any leg
pressure you give will be a lot harder than you meant, because it's all
coming through your heel. To compare, press on something with the palm
of your hand. Now press with the heel of your hand. Feel how using the
heel of your hand makes the pressure seem harder, even if it's
not?
This also makes your seat much more unstable--you're resting *entirely*
on your two seat bones, with no leg on the horse to help stabilize you.
When your toes are pointed all the way in--or if you are gripping with
your knees, which causes the same thing--then your lower leg comes off
the horse. It flaps around unsteadily (yes it does, even if it doesn't
feel that way to you!) and bumps the horse unpredictably.
You're also usually squeezing pretty tight on the saddle, which
confuses the horse, and often your knees will come upwards; this makes
your leg come forwards. When your leg comes forward, you lose your
head-hip-heel line (red line in graphic). Most of the time you will
either lean forward to keep your balance, or you will end up leaning
backwards to try to keep a "straight line" in your body.
In order to keep your balance and to give your aids the way you meant to,
you need to keep your whole leg on the horse all of the time--but resting
softly, not pushing. Then you push gently when you want to use the leg.