ExRx.net : Home. ExRx.net is a resource for the exercise professional, coach, or fitness enthusiast. It offers evidence based exercise prescription tools and resources including reference articles, comprehensive exercise libraries, and fitness calculators. ExRx.net is a recommended resource in ACSM''s Resource Manual for Guidelines for Exercise Testing and Prescription (5th 6th, and 7th Editions). ExRx.net has also been an NSCA authorized CEU provider since 2008.. exercise prescription,exrx,back exercises,shoulder exercises,distance converter,chest exercises,weight converter,deadlift,one rep max calculator,1 rep max calculator,upright row,bent over row,exrx.net,military press,shoulder press,length converter,romanian deadlift,arnold press,1rm calculator,one rep max calculator,hack squat,skeletal system,exercises,fitness,muscles,weight lifting,weight training,weight loss,weights,bodybuilding,kinesiology,strength,training,stretches,workout,stretching,prescription,fat loss,nutrition,weight reduction,instructions,sport psychology,assessment,power,information,flexibility,exercise,biomechanics,fitness testing,bodybuilding,body building,fitness calculators,anabolic steroids,pharmacology,professional,psychology,routine,intensity,muscle mass,muscular anatomy,physical,physical fitness,physique,posters,cardiovascular endurance,muscular endurance,rx,speed,sports,sport,medicine,coaches,athletes,athletics,consulting,structural,courses,drug free,duration,evaluation,development,tapes,wellness,better health,figure,fit,frequency,gym,gymnasium,health,human body,human movement,personal trainers,ACE,ACSM,hard gainer,heavy duty,beauty,promotion,gym equipment,equipment,lifestyle,links,attractive,program,advice,body sculpting,regimes,huge,athletic shoes,exercise science,evidence based,strength standards,musels,musles,muslce