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Zatsiorsky, a respected Russian sport scientist who served for 18 years as chair of the Department of Biomechanics at the Central Institute of Physical Culture in Moscow. He discusses the accentuation principle in detail in his textbook Science and Practice of Strength Training. <br>Zatsiorsky says that if an elite volleyball plazƺQ 4['t9m [RNM7ĺcF~[c63A-ĭ=U9LVUw9'3jzeٻ*w KR`i>[@c[=ɬ}cN4^:b'OVz*ƳВUeeuA%EXEfz],ِǯWdbu皌@ם7y6eqSʐ\⑈dTC2ւi6 w׊ )Mcl搰Fy@ HUDG&㓓z9999P$zypO㞔oxjn>@?7S$]ܒ4qqsHGU4&C) 8AM`fUx9覫1Ks"E9ZQAW.*ZUH'\ju]]_O$gq6d{ЖdjD ċAֺ]D7I\Լ!mieTr35u~izm4ྲྀt CwoJ)-5(|nK.xʯjSn%z+ 8eȫL@9jkjĻ"VZ /'p\I׊V*V_.dT >B3ָfktE2ȣN>W{z1 =uDq4' #NZp`29 rAL$q)^HUZH' jhrrQBֆDc9[q8GJ*&` QE IvH>.JUozZ쬧H#Dv$|֑ 8,xՉU <7ZeYՊ.{ w\EX /o8HI zZsZHG$m)E!7CG#+#`191OL:;RiH@L( Xq :p"*KuF$8O" g fD֋!=s+Ҋj(l0b@p ſMM=1AiJlb -r0 Tכ>XtA<,95+/P7449˱kHV}2_^qZ(:sD^3A,d2^ɒ9uE. U3YH8o~+H pzRdz}hhŚ`TDe;Մ[z5Һu#9 ͵FAdbOsڷ;iF²)\j[egS3?J. cN⼷UQ+/;'y @OZIvwW[2-72Mոv㜎@QPs2űp: ]Fڥ~f )udKFz )&7iP䌒OAIhD9 {M(k`&y)'OnEfo!IBY) RȨڅq\ΜspRI Kld86@=*b̠1:Qq\Ԑi(%qWj+)%mpa#z)2|#</V =Lf,FpF;ṽ;@ӹ4gr*aA֚lfx' `ᐡJg a܍i  ($wtU\<4#aq'iV~]ZM 7A޶nWґ]UrB=ERƕs2 %D#'{MtX#wM1$ WvfmLet s examine the box squat in more detail by looking at the concept of starting strength.<br><br>Getting a Head Start on the Competition<br><br>First, it s time for some more definitions. During a concentric contraction a muscle develops tension and shortens, causing movement to occur. During an isometric contraction a muscle develops tension without a change in joint angle; thus no external movement occurs. And during an eccentric contraction, a muscle develops tension and lengthens, also causing movement to occur.<br>One factor that makes the box squat especially effective for sport-specific training is that the exercise requires the athlete to perform a concentric muscular contraction after a prolonged isometric muscular contraction. The effect of this on performance is that the pause (isometric) phase dissipates the stored energy (part of the plyometric effect) that develops during the lowering (eccentric) phase of the lift, energy that would otherwise be used to help during the lifting phase. <br>In powerlifting competition, research has shown that an extra second delay waiting for the judge s signal to press the weight off the chest in the bench press could result in a five-percent difference in the amount of weight lifted. This is one reason that although it has been allowed in competition to have spotters place the barbell on the chest to begin the lift, it is a technique seldom used because there is virtually no plyometric effect with this technique (besides the fact that you have to have well-trained spotters to properly place the weight on the chest).<br>In certain sporting movements, an isometric contraction in the set position precedes a concentric contraction, but t'l pTRA=e>}E?6#`(0 rfI"(1Ci0Z0kw^Y9[iՎ.?Goᰢ(z5w%_63 $!bw$8ݩrGZӨeݿ }$b { o1Y\%/Q",#FEwVjc|Eox=Rz,`2yNIT:.Fŏntw6G`^ Ҭ ,}t9Iin7JpI9(ʝ,pE3ܧ4SJ#L裢냥CE 27j 嫍b60­p8<P.av.%i,m'p{o~"Q1Qfv>OOZ?_e\s4\lXBأw֌K[ب2\)X O"d{