In 1996:
In the Arlington Invitational Handicap Cigar carried 130 lbs to a 3 1/2 length 
victory over Dramatic Gold who carried 118 lbs.
In the Pacific Classic (a weight for age race), the end of Cigar's winning 
streak, Cigar carried 124 lbs to be defeated by Dare and Go who also carried 
124 lbs.  After ending Cigar's winning streak, Dare and Go, went on to win. . 
.0 (that's zero) races.
In the Woodward Stakes Cigar redeemed himself, carrying 126 lbs defeating two 
horses that were carrying 121.
In the Breeders Cup Classic Cigar (126) was defeated by Alphabet Soup (126).
This data would seem to suggest that Cigar was more successful when he carried 
more weight than his competitors.  I have no intention of making this 
contention.
Realistically speaking, if we want to understand Cigar's defeat in the Pacific 
Classic (I was there that day), we have to look beyond the weight he was 
carrying on his back.
Some people (including his jockey) suggest that  Cigar was beaten by rider 
error.  Jerry Bailey says that he never should have chased Siphon(Brz) through 
such punishing fractions.  He had nothing left for the home stretch.  But 
then, Jerry Bailey and Bill Mott (Cigar's trainer) didn't chase Siphon(Brz) in 
the Hollywood Gold Cup (about 1 month earlier) when he was riding Geri, and 
Siphon won, pretty much, wire-to-wire.  So who's to say whether Cigar would 
have been defeated by Siphon if he hadn't tried to keep up.
Some people suggest that Cigar was defeated by a plane trip to Dubai and back, 
which, no matter how you slice it, is going to take something out of a horse.
Some people suggest that Cigar was defeated by a plane trip from New York to 
California three days before the race.
Some people suggest that Cigar was defeated by the fact that he was pretty 
much lame in his back legs by that time.
Some people (those that saw the horses in the post parade) suggest that Cigar 
was defeated by Dare and Go because Cigar was having a bad day and Dare and Go 
was having a good day (if you could have seen that horse that day. . .he was 
READY to run).
Whatever it was that defeated Cigar, it wasn't weight.
In fact, there is absolutely no statistical evidence whatsoever that 
demonstrates that weight carried has any effect on the outcome of sprint 
racing.  Horses carrying little weight do not win by wider margins, they do 
not clock faster times over the same distances on the same tracks.  The best 
that can be said about weight carried in sprint racing is that intuitively we 
feel that it "ought" to make a difference.  There is no evidence to bear this 
out, not even in sprint racing.
Forego, a renowned "handicap" horse had successes and failures under heavy and 
light weights.
Early detractors of Pharlap complained that "of course he could win, with that 
little dinky jockey he had," but then they piled the weight on him and he 
still won.
Man o' War won no matter how much weight he gave away.
There is no correlation whatsoever between weight carried in a race and order 
of finish.
There is no correlation whatsoever between weight carried in a race and 
finishing time.
Go ahead, look at the Racing Form, look at the Thoroughbred Times, look at 
historical records.  You won't find it.
Which brings us to endurance.
In the few instances where studies have been done attempting to link success 
in endurance to rider weight, no link has been found.  To say that fewer 
heavyweights win than do middleweights is to say nothing.  More middleweights 
compete than do heavyweights.
The fact is, the majority of competitors in endurance are physically fit 
women.  Physically fit, for obvious reasons (which I hope that I don't have to 
go into).  And women, because, well. . .it is an amateur horse sport, and 
amateur all amateur horse sports are populated by women.  I know of no men who 
say to themselves, "I am not going to ride endurance because I am too heavy, 
and therefore have no chance of winning."  The people that I know who do not 
compete in endurance, do not compete in endurance for other reasons:  the 
sport does not suit them (biggest reason), they don't have the horse for it, 
they don't have the time to condition, they don't have the money. . .
Physically fit women rarely ever are heavyweights (note that I don't say 
never).  Most people who participate in this sport fall in the weight range 
(including tack) of 150-180 lbs.  And what do you know??  Most of the winners 
do too.
I am willing to concede that fat (note I do not say heavy) endurance riders do 
not compete as successfully as those that are not fat.  But this is not 
because of the extra weight that the horse is required to carry, but rather 
because the rider is physically unfit to be a serious contender in the sport.
The placement of a load on a horse's back is far more relevant than the actual 
weight of the load, and how that load shifts as the horse moves (i.e. the 
dynamic placement rather than the static placement) is even more relevant.  
There is absolutely no way that any handicapping formula could compensate for 
that (this is true for sprint racing too, BTW.  Why else would an 
owner/trainer consent to have Lafitte Pincay ride his horse at "3 lbs over" 
instead of getting a jockey that can make the weight?  Go to Santa Anita 
someday and you will find that frequently horses are sent to the post "over" 
weight.)
I am not saying that the weight carried is irrelevant to the training, 
conditioning, and competing an endurance horse (or a sprint racer either).  
Nor am I saying that weight carried has no bearing on the amount of work done 
by a horse over distance.
What I am saying is that the relationship between weight carried and the time 
it takes to complete (note that this is not the same as "work done") is far 
too complicated to reduce to any kind of formula.  It varies from horse to 
horse, from climate to climate, from terrain to terrain, from distance to 
distance, from rider to rider, from day to day. . .
To attempt to codify it into rules by which we then try to handicap endurance 
horses is to open a can of worms that would best be left FIRMLY shut.  To 
attempt to 'level the playing field' by monkeying around with weight 
requirements would be to introduce a multitude of inequities.  We would then 
have to remedy these inequities by adding more handicapping criteria or 
abandon the idea all together.  I say, let's abandon the idea all together 
now, before we introduce these inequities.
kat
Orange County, Calif.