Word: jockeying
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...ribbon event - with wins at top-flight English races the 2,000 Guineas and the Epsom Derby. What's more, Sea the Stars' two-length victory at Longchamp was his sixth in Europe's tough Group One races in as many months. The horse, says Frankie Dettori, a leading jockey who trailed Sea the Stars in the Arc, is "in a class of his own." (See pictures of British horse racing...
...That he won despite appearing boxed in and off the pace for much of Sunday's race speaks not just of his dazzling turn of speed but of his ability to maneuver; Irish jockey Mick Kinane threaded the horse through holes in the field that were invisible to other eyes. That Sea the Stars has maintained his form over six grueling months - from the lung-busting sprint in May's 2,000 Guineas to the undulations of Epsom in June - is an even greater achievement...
...jockey-plus-horse system," as the researchers call the racehorse-and-rider team, will start off essentially the same as any other: a combined mass of roughly 1,100 lb. (500 kg) of living flesh, with the horse representing about 87% of the total weight and the jockey making up the rest. One key to speed will be how lightly the horse can carry that 13% load. The investigators found that the horse's back oscillates up and down about 6 in. (150 mm) throughout its stride, and fore and aft about 4 in. (100 mm). The jockey moves...
...Whether the jockey is sitting in the saddle or not, the horse still has to carry his weight," Spence says. "But by absorbing the jiggles of the horse, the jockey prevents the animal from having to make him go up and down with each stride. It's the difference between the horse carrying a moving rider or simply a quantity of lead that weighs the same." The crouched position the jockey assumes throughout pays an additional dividend by minimizing wind resistance...
...physics, however, nothing comes for free, and as the horse's workload goes down, the jockey's goes up. "The jockey's legs oscillate in length while transmitting a vertical force," the researchers wrote, "resulting in substantial mechanical work...