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Suppose that one child runs a few hundred meters a day in some sporting or recreational activities. This can easily involve several thousand foot strikes in which the reaction force imposed on the body can easily exceed 4 times bodyweight with eveǯ~)5R,kE+2!(+G"*=rv^/n-7Y݇1Q r&}i$}h3{tIj!.jҍe?YtaF?W?VxH-Pf s?f-Engu=n{s帵ٶ?1#޶'Ӯx$\`ueE q%3g_*i3"D 8W=G i ؁^mZ F86;gώ5}CXfSg'[gm\ֱ%yDrFQA'ד]!eQ`|MsQ\]};y7"$z[Q]*b7Xdߝy3D{ss4ed/$orԝ=kc: I$Q!uqZv)BJczR){Rc {Rj2`ZM(2zd'֎?*\qEPH4:B8YfR=ht;.-ch Fjдm>c_9)) ?1<#WGVnq@X! c SJ^Z Cѕ:(Z2?!4SܟhE "?JLwBt(EcS (bQ@ zRw^PfSE4QE-Q@al athletes. In the November, 2000 issue of Scientific American Presents, Yessis was quoted in an article by Bruce Schechter that "genetics only determines about one-third of an athlete's capabilities. But with the right training we can go much further with that one-third than we've been going."<br>Fast-twitch muscle development may have tremendous health benefits for the female, but that alone will not provide her with medal-winning records. BFS trains athletes for sports, which is why the program includes such athletic training methods as plyometrics. "When a sprinter runs," Yessis explains, "her foot stays in contact with the ground for only a little under a tenth of a second, half of which is devoted to landings and the other half to pushing off. Plyometric exercises help athletes make the best use of this brief interval." <br>In volleyball, basketball and soccer, it's been estimated that women can be as much as eight times more likely than men to injure the anterior cruciate ligament, or ACL, which helps stabilize the knee. According to the American Orthopedic Society for Sports Medicine, each year approximately 20,000 high school girls suffer serious knee injuries, most involving the ACL. Several theories have been proposed to determine why women are at such a high risk; here are just a few:<br>" Girls don't usually get involved in sports at a young age, leaving their coordination for sports behind that of males.<br>" Because women have less muscle mass than men, they may rely more on their ligaments for support than on their muscles.<br>" A woman's wider pelvis changes the alignment of her lower extremities, causing a woman's thighs to angle inward in a knock-kneed position and the lowety, where I worked with football players and the power lifting team. Paul Howard, a lineman, gained 45 pounds in one year, reaching 275, and mproved his forty from 5.2 to 4.8. He played ten years for the Denver Broncos. Paul Devine was a running back who was also on my power lifting team (see Figure #6). He helped us win the1973national collegiate power lifting championship. Paul graduated and raised his family in sothern California. His son Kevin was taught how to parallel squat and train (see Figure #7 and #8). Kevin ran a 4.2 forty at the combine and played in the NFL for several years. I was so impressed with Kevin that we did a football speed video featst9>wT`Q$v|< ~ʳ@"ߧc#ȏrG~oyn;Pbdm+Ӧ>0WAS]hcvWa㛏,K.Isח_*^{+_0ߑj@m\~CT'IhI4#=RW+y M*.>M?vrʁL~S^4{S7ULr4Dq(MSӿǟǧn *H&RW.I{}A'ś>X7/yޙ_JHc:`_Tӗ_ V8p TPGd7 -JO e+K;^Q)Fgt?ş?A~鏩[>M?X7+ I&OUunSt]PߴsgY*qLMݱu8Xo[.:S~}k\9|<>yO/"_J񅬾"OPzVsbIgOQ>}c<Ovyzg<7ꍬz^DN<]== ˦4_~m(v3WLbHmLHhlLImLIhlL>JmLAJo̓5hlL͓mL ͓hlL͓mL͓[QkΓ