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(S zui"wIǭjRq<|D ^zV.'n#1ʠ wbkGk铡1#rL K{p W]B- K]EZYnW~?Tm"rb5EYDHWTٜ7fb\T3Z'AQS%Ül M[JVY1Ϣ3@E,Ot##sV08PqNbGܿU=Xո0ez(igN)4̂U"3Iv^ cɘކ@N1ޮi6pIGrbAj\xEhWZ57FqKٙ])ɯ3mڮ`fX`̤ь\nwZ5+)Iׂ*ĺ|Ҽ6t~v1 H~n',VФj{cz #G\T5mr$¡q!-OmcF?x1:c5v8 =8aW3WcD@R"xOD$2FyF:Sg*eL!NzBsY¦TRjΩkA;NZ5vHP"qڴllq܈ ϵijZqfP:NROS.&D'ɵfsOsXz4B&`H'S6RRD9v\Beܡ.@_'h{jSPv+mNKyZsfnZ흁!y҅.Hk{I[5bc*u9u$e$VA`sґO$V9nKĹ4P"BAY]ʅOHa_Rji Rvb\[ȼJ)zc]OOZzӷsK-ͽnEOby?n@XƸHHyQX ^&(tWPsG'۟d Y"0dZzBu"ZV#Kijs,.]<)ى)=S]?kihEUP0@A $e?1PG6Z]30J?Nͺ@ÐTHĺ('`S>)u92mcyN|uA]/:΀gYgjڥ|Although injury to the epiphysial plates may cause bone deformity, there is little risk of this occurring with weight training compared to most sports. As for the risk of weight training stunting growth, premature closing of the epiphysial plates is related primarily to hormonal influences, not injury. Addressing this subject is Mel Siff, Ph.D., an exercise scientist whose doctorate thesis examined the biomechanics of soft tissues. <br> It has never been shown scientifically or clinically that the periodic imposition of large forces by weight training on the growing body causes damage to the epiphysial plates, says Siff, in his book Facts and Fallacies of Fitness.  It is extremely misleading to focus on the alleged risks of weight training on children when biomechanical research shows that simple daily activities such as running, jumping, striking or catching can impose far greater forces on the musculoskeletal system than very heavy weight training. <br>To 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 aercise can build a solid foundation of strength whic affects the Hamstrings, Quads, Hips and Lower Back. The Hex Bar exercise builds functional hamstring jumping strength. Therefore, a jump stance should be used. Keep the hips down and the head up. Spread the chest to lock-in the lower back. Do once or twice per week. This is a BFS Core Lift exercise. For back safety, lightly bounce the weight off the floor when doing reps. Keep the repetitions to five or less.ase your stride length with the back leg drive. You want to run tall. However, to plant the foot directly under the hips is an advanced concept. Therefore, I want to devote a whole article to that technique at a later date. I will have a 4.2 forty-athlete show you some great drills to more ful