What Is an Automated External Defibrillator? An automated external defibrillator (AED) is a portable device that checks the heart rhythm and can send an electric shock to the heart to try to restore a normal rhythm. AEDs are used to treat sudden cardiac arrest (SCA). SCA is a condition in which the heart suddenly and unexpectedly stops beating.
curl. 1  to form into coils or ringlets, as the hair. 2  to form into a spiral or curved shape; coil. 3  to adorn with, or as with, curls or ringlets. 4  to grow in or form curls or ringlets, as the hair. 5  to become curved or undulated. 6  to coil. 7  to play at the game of curling.
  The biceps are a grouping of muscle fibers that expand and contract one way. When you do a bicep curl, the muscles are lengthened under tension.There are thee phases to â¦ the curl. The first phase is a slow lowering (eccentric-lengthening) of the weight down to a parallel positioning with the ground.This should be a controlled 3-5 second movement. It should burn but not injure. The Proper Way to do a Bicep Curl Bicep curls are one of the first exercises taken on by individuals interested in weight training.