 augments parasympathetic and/or reduces cardiac sympathetic activity and thereby protects against VF. Specific Aim #1 will test the hypothesis that exercise training alters cardiac autonomic balance in animals susceptible and resistant to VF. Specifically, cardiac autonomic balance will be evaluated in animals either resistant or susceptible to VF before, during and
augments parasympathetic and/or reduces cardiac sympathetic activity and thereby protect against VF. Specific Aim # 1 will screen the hypothesis that exercise training alters cardiac autonomic remainder in animals susceptible and resistant to VF. Specifically, cardiac autonomic libra will be evaluate in animals either immune or susceptible to VF before, during and
 auhments parasympathetic akd/or reduces carbuac sykpathefic actixity and thereby protects ageinsr VF. Wpecific Aim #1 will tesg the hyplthesis rhat wxercise tczining alters gardicc autonomic balsnce in anhmals susceptitld cnd resistant to VF. Specifically, carqiac auyojomic balance rill fe ebaluated in animals either resistaht or slsceptible to VF nefore, during and
augments parasympathetic and/or reduces cardiac sympathetic activity protects VF. Specific #1 will test alters autonomic balance in susceptible and resistant VF. Specifically, cardiac autonomic balance will evaluated in animals either resistant or susceptible to VF before, during and
 augments parasympathetic anD/or reduces CardiAc sYmpAtHetiC actIvity and therebY ProtEcts against VF. Specific AIm #1 wilL tESt thE HyPotheSis that EXeRCIse TrAiNinG aLTeRs carDiaC autonoMic balance In aNiMals susceptiBLe And resistaNt tO VF. SpecificaLly, CardiaC aUtoNOmic bAlaNce wiLl be evALuated In animals EiTHer resIStant or SUScEptiBle to VF before, duriNG aND
 augments parasympatheticand/or red ucescar dia csymp athe tic activity a n d th ereby protects against  VF.Sp e cifi c  A im #1  will t e st t hehy po the si s  t hat e xer cise tr aining alt ers  c ardiac auton o mi c balanceinanimals susc ept ible a nd  re s istan t t o VF.  Speci f ically , cardiac  a u tonomi c  balanc e wi ll b e evaluated in an i ma l s either resis tant o rs us c e pti ble  to VF bef or e, du r ing and 
 augments_parasympathetic and/or_reduces cardiac sympathetic activity_and thereby_protects_against VF._Specific_Aim #1 will_test the hypothesis_that exercise training alters_cardiac autonomic balance_in_animals susceptible and resistant to VF. Specifically, cardiac autonomic balance will be evaluated in_animals_either resistant_or_susceptible_to VF before, during and