▁the ▁end ▁of ▁the ▁range ▁of ▁motion ) ▁the ▁negative ▁effects ▁are ▁elimin ated ." ▁ ▁Add itional ▁research ▁has ▁shown ▁that ▁as ▁much ▁as ▁ 7 5 % ▁of ▁a ▁movement ▁can ▁be ▁devoted ▁to ▁slow ing ▁the ▁bar ▁down . ▁Elli ot , ▁et ▁al . ▁( 1 9 8 9 ) ▁reported ▁that ▁during ▁ 1 - R M ▁ben ch ▁press es , ▁the ▁bar ▁dec eler ates ▁for ▁the ▁final ▁ 2 4 % ▁of ▁the ▁range ▁of ▁motion . ▁At ▁ 8 1 % ▁of ▁ 1 - R M , ▁the ▁bar ▁dec eler ates ▁for ▁the ▁final ▁ 5 2 % ▁of ▁the ▁range ▁of ▁motion . ▁Research ▁has ▁shown ▁that ▁for ▁best ▁results ▁it ▁is ▁important ▁to ▁load ▁the ▁bar ▁with ▁the ▁amount ▁of ▁weight ▁that ▁allows ▁for ▁positive ▁acceleration ▁to ▁be ▁maintained ▁through ▁the ▁full ▁range ▁of ▁motion ▁for ▁the ▁lift . ▁An ▁effective ▁ball istic ▁lift ▁develop s ▁speed ▁throughout ▁the ▁entire ▁range ▁of ▁motion ▁of ▁the ▁lift ▁until ▁the ▁moment ▁of ▁release . ▁ ▁C riteria ▁ 1 . ▁Mus cle ▁rec ruit ment ▁principles . ▁Ball istic ▁lif ts ▁force ▁the ▁mus cles ▁to ▁produce ▁the ▁greatest ▁amount ▁of ▁force ▁in ▁the ▁short est ▁amount ▁of ▁time . ▁In ▁accord ance ▁with ▁H enn eman ' s ▁size ▁principle ▁mus cle ▁fib ers ▁are ▁rec ru ited ▁from ▁a ▁low ▁to ▁a ▁high ▁threshold ▁as ▁force ▁requirements ▁increase . ▁▁ 2 . ▁Speed ▁of ▁the ▁movement . ▁ ▁To ▁ensure