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Bicep Curl Machine. The bicep curl machine is one of the best exercises to help beginners understand the action of the bicep muscle. Using an arm curl machine ensures that your biceps get an intense workout. There are many differe.
  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. The Proper Way to do a Bicep Curl Bicep curls are one of the first exercises taken on by individuals interested in weight training. 2  Also known as strength training, this type of exercise focuses entirely on mâ¦.