▁and ▁neck ▁as ▁described ▁in ▁the ▁original ▁Kel der ▁book , ▁The ▁E ye ▁of ▁Re vel ation ▁as ▁this ▁compress es ▁the ▁verte bra e ▁and ▁inter verte br al ▁disc s . ▁Instead ▁of ▁" lean ▁back ward ▁as ▁far ▁as ▁possible ; ▁at ▁the ▁same ▁time ▁the ▁head ▁should ▁be ▁lifted ▁and ▁thrown ▁back ▁as ▁far ▁as ▁it ▁will ▁go ," — ▁as ▁R ite ▁No . ▁ 3 ▁is ▁described ▁by ▁Kel der ▁— ▁she ▁recomm ends ▁keeping ▁your ▁sp ine ▁" long ▁and ▁strong " ▁and ▁to ▁" av oid ▁compression ." ▁ ▁W itt ▁added ▁core ▁stability ▁to ▁the ▁R ites . ▁This ▁is ▁an ▁internal ▁movement ▁and ▁is ▁not ▁obvious ▁to ▁a ▁cas ual ▁observer . ▁People ▁doing ▁the ▁T 5 T ▁version ▁look ▁the ▁same ▁as ▁those ▁doing ▁the ▁original ▁version ▁except ▁they ▁don ’ t ▁compress ▁the ▁lower ▁back ▁or ▁neck . ▁When ▁core ▁mus cles ▁are ▁activ ated ▁correctly , ▁they ▁completely ▁enc irc le ▁the ▁sp ine , ▁stabil izing ▁and ▁supporting ▁it ▁like ▁a ▁natural ▁weight - b elt ▁or ▁g ird le . ▁People ▁who ▁have ▁a ▁history ▁of ▁back ▁or ▁neck ▁pain , ▁and ▁those ▁with ▁weak ▁core ▁mus cles ▁are ▁more ▁pr one ▁to ▁injury ▁as ▁their ▁mus cles ▁are ▁unable ▁to ▁function ▁correctly ▁in ▁stabil izing ▁and ▁protect ing ▁the ▁sp ine . ▁In ▁T 5 T , ▁core ▁strength ▁is ▁developed ▁by ▁adding ▁a ▁new ▁mus cular ▁challenge ▁to ▁the ▁core ▁mus cles ▁every ▁week ▁for