The plank jack is a combination of two very common exercises: the plank and (​big surprise) the jumping jack. You get on all fours in a plank ...SkiptoContentViewourAccessibilityPolicyHYDRATech™Instantisnowavailable:Optimizehydrationforsustainedperformance:HYDRATech™Instantnowavailable:ShopNowInviteFriends&Get$20OnnitXRewards:EarnpointsforexclusivesPlankJacks:HowToDoThem&WhyYourWorkoutNeedsThemWrittenbyPhilWhiteApril29,2019UpdatedJune23,2020Category:FitnessTags:CoreHomeWorkoutMindsetStrengthTrainingShareonFacebookShareonTwitterShareonPinterestAplankjacksoundslikesomethingyoumightfindinaisle33atHomeDepot,butit’sactuallyapotentexercisethat’sbecomingincreasinglypopularinHIIT,core,andcircuittrainingclasses.It’stimeyoufoundouthowtodoaplankjack,themusclesitworks,andhowyoucanfititintoyourworkoutsforbettercorestrengthandgreaterconditioning.Whatisa Plank Jack?Theplankjackisacombinationoftwoverycommonexercises:theplankand(bigsurprise)thejumpingjack.Yougetonallfoursinaplankposition,andthenhopyourfeetoutwardandinwardwhiletryingtokeepyourspineandpelvisaligned.Theplankjackfirststartedtohitthepagesoffitnessmagazinesin2014,whenitwasofferedupasamoreadvancedalternativetothestandardplank—alongtimestapleofcoreworkoutsbecauseofthetotal-bodystabilityitdemands.CelebritytrainerslikeTracyAnderson,AnnaKaiser,andErinOpreastartedincludingplankjacksintheirprogrammingforab/coreworkouts,andthatcatapultedthehumbleplankjackintothefitnessmainstream.Whetheryoutrainatabigboxgym,aboutiquestudio,orworkoutathomewithafitnessplanyoufoundonline,you’relikelytocomeacrosstheplankjack.WhataretheBenefitsofDoing Plank Jacks?Plankjacksaresimilartothemountainclimberexercise,inthatyoutrytostabilizethehipsandspinewhilemovingthelowerlimbs.Becauseprettymuchthewholebodyisactive,there’sagreatdemandplacedonyourheart,soplankjacksbuildcardiocapacitywhilealsodevelopingstrengthandstability.“Plankjacksgetyourheartrateupquickly,andarelower-impactthanexerciseslikehigh-kneesorburpees,”saysCarmenMorgan,aHouston-basedtrainer(@mytra