JFIFC    $ &%# #"(-90(*6+"#2D26;=@@@&0FKE>J9?@=C  =)#)==================================================" }!1AQa"q2#BR$3br %&'()*456789:CDEFGHIJSTUVWXYZcdefghijstuvwxyz w!1AQaq"2B #3Rbr $4%&'()*56789:CDEFGHIJSTUVWXYZcdefghijstuvwxyz ?BN *~3Z\ᰊqN+ЊEh\.Rдv5WXeOgv rX*Tb=@W_:b;u5we~;i6f|qp:+xĂMBG)tmɒ8tpt"%i<9n_|XGf~̞#kѭaIIbq]NAƼGHh:tSxGTWeg&g!}Hu2XބfߵWl[h6p8OZFUvVXƁµq)\!HH+~81%f;ʓRPTl1R7)@w_\ӂ((8L"Ս݅Ul`\T2l SoAPB`#BM\2<vg``\[Hdr#J|wFU'h/ԍVb]Vyui07s3}+Ӈ{wRS$Xcu;k345`6|Z ]upni+ӾM G'N4lqTN ?*,*Xղ9ӯ&}ZWDZ5`s't-4A搞1LB8Cӥ&y4POR3P4 1DdC+f Wy*X]G+<5qa$/5ŋoCˣ7}Φ-/|!h*2#bȋ4!w`sZW D~NZu].2GG%$9Nj&2"m#ֱ,^p +;6jkEIc a\UճHUz`bGjƷlJrjWg0z ִY md g΢@u~U ޢ#Wk@g˳+^u_p#h~5& J]ZO7T5Մu|\E&LcNcM ;WgTB@jAhݔt zp+ψ#Sr?ɈOFuaڳG]T7YhNW>^_&Fdzx?jM\jY4)"M)Qg)~P2ʊtvFÐj4i5fLdPL)ӎz0:)>GLW1[\qJ;yܴN~W֢ظ\G צ(7IY]cHכqW#u{5{Xw|oi :zSX%H=v5ǂ 8AJ#+\H^Yrecv$)`\ z 9kS|t=M>˞Jk0ס|<]AD7燎<e·ӪZ鸝S+W"`Ċ{;>WHc1A]Eυc%366ΆiH}+ފ23EN:S4ddON%jG ҔՇM4OFӡP}*ʹIBvQZyף֌]6 ׋Q嶏(^hb{ב|DӼF[kc]4UE}Qٻ=Qij4{ѴO@)r8=jxprsW!aNF5t~H p |Jv74t0"ɤ<ڬ|3͵ա?qZVӜ8PC`t\.?]/hInOjL9ڔ?Ib:8X2 rGlhiw:ݐHH'bI'J_DJBKo)隵/1ڃ;0߷~%ݽ8Y\Qt}. {n7(EtEoul躈2Ds5NJ߾{?g#G_"yRn}+WÚ~uıG5xoC:¹9v6!).sXW:#DMEc5i yFCZӦ@Q=jI[ג2=gBxwUt.˘z+֤.=^ ѭ|W.U%ʞ?Ny9Pzkn>a+oҸZ©.2ۡoAs1#' DI+vqi aҊ;Q@ Ѹ/n:"Fp<|{C[7 MnLb uUd&o4kq#ւccR:\ ee9#+Nǚ$Xb6\CcBU~VxAǗ!C֬F |O` bJƒNtuWnpk fHc^y TCRIWP kΝ%sׅ[WSв4F}+\A85.,6k,Ok9qRN4z)-f`TjZw~gUo,g'U11s(6qrpIޚkrFF*e?".JpP(٩7$'AB(p pRDW>ԶeSU éF~B2:`h:FEB. 6՘ PI]ޘ3ӊ{uX9-$ 4LcHeᲆylPGl~&DZe$mq:">XM$YR~'$~qT/ٙÎ"{e cD ɸݳEnuC~E6|9-bIU.m2qy:t#j0+(3ŸPvyofN8=O/վ&@#yi(Mz&#K08Xs.I+6sj19#5HlQ in͑ 1R jqJEɌ $ kX6 \>Q? @ٛf<đhBg>(4%\ʱRqؐyVz~",n=(^bO9HE^ C1ҚFGj@yqH848ϵlMM;Y)@GQ汶{-Z<:qL9 qrD i~T8!Iߥ~A.'E3To illustrate his point, Siff compared the stress of squatting with running.  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 every stride. Now let another child do a typical average weight training session with 3-5 sets of squats (say, with 10 reps, 8, 6 and 4 reps), with bodyweight or more for the last set. That bodyweight is divided between the two legs, so that, even taking acceleration into account, the loading per leg is bodyweight or a little more, while the spine is subjected to the full load on the bar. In other words, the legs and spine in controlled squatting are exposed to significantly less force than in running and jumping. Normally, exercises such as squatting will be done no more than twice a week for a total of about 60 repetitions, while the running child will run every day and subject the body to those many thousands of impulsive foot strikes. <br> It does not require much scientific knowledge or computational genius to see that the cumulative loading imposed by simple running activities on the lower extremities and the spine is far greater than the cumulative load of two or three times a week of weight training. Does this now mean that we are justified in recommending that children not be allowed to run, jump, throw or catch because biomechanical research definitely shows that such activities can produce very large forces on many parts of the growing body? <br>It should be obvious then that there is nothing wrong with running and other normal activities of childhood, and therefore no reason to disallow activities of lesser impact, such a