Lets have a look at this
Overweight and out of shape - Riding is an athletic sport which demands good muscles and a trim body for the best results.
Can't really argue with that, the better athlete the rider is, the better the horse can perform
Those who feel that it should be like sitting on a motor cycle should stick to motor cycles.
Probably true, there is a world of difference between a bike and a horse
A rider who is overweight cannot perform as well because he puts more stress on the same muscles if he is 20 lbs. Overweight.
Again probably quite true
If he falls, an injury is more likely because the greater weight puts more stress on the same bones.
Never sure about this one, could also argue that better padding would protect a rider, well at that point a faller.
It goes without saying that extra lbs. Make a huge difference to the horse. Look how jockeys struggle over a pound and what a little extra weight does to the speed of a race horse.
Also true, that's why they handicap racehorses by adding weight
Overweight people do not like to recognize the importance of weight and fitness in horse safety.
To be honest this is the only bit that I have an issue with.
But, I do have some sympathy with stables that rent horses and do holiday packages, the horses work hard and long, quite often the riders aren't that experienced, and putting a weight limit on is only sensible.
Before anyone shouts, remember that I am myself a BIG rider