This varies greatly dependent on many factors.
First you must consider the breed of the horse (specific breed is important beyond the generalization of pony vs. horse vs. draft) as some breeds are built stockier and for more hard work and endurance.
Second you must consider the age and conditioning of the horse, a horse in its prime who has been exercised regularly will be able to hold more than an older or less worked horse. It also depends on the type of riding you intend to do and how long you plan to be on the horse.
Some people go by a 20% rule (rider should weigh no more than 20% the weight of the horse) but this can leave room for error based on the factors I've already listed. And some people consider anyone over 31 BMI to be unsuitable to ride, again leaving room for error based on the factors above.
But, it also depends on where you plan to ride, some riding center/stables do have strict guidelines (like the two I mentioned or similar). But, if you're riding your own horse, or a friend's horse you need to use judgment based on your knowledge of the horse's abilities and condition and the type of riding you're going to be doing.
There is no set weight limit to riding a horse. However, horses can carry 1/3 of their weight. If your weight is more than 1/3 of your horses, you can cause injuries and soreness. And eventually the horse will become sway (its back will curve in) with age. People should choose a horse that is strong enough to hold them. Make sure of this to be sure you are not harming your horse.
Horseback riding.
You can keep your weight equal on a horse if you stay straight, and don't bend your back, except when jumping, then you keep your heels down and arch your back. That's all you can do!.
horse back riding
Brazil =)
It depends on the riding school.
There is a number of horse back riding places around. Depending on where you live and what you want out of horse back riding lessons. The best is the Ceader lodge and also Jeffery Wilms ranch.
prince phillips hobbie were dancing, horse riding, playing cricket
A saddle is what a rider sits on when riding a horse.
polo
Therapeutic horse back riding.
Equitation