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  1. #1
    jay monkey is offline New Member
    Join Date
    Aug 2004

    eccentric and concentric

    wat are eccentric phase and concentric phase when ur workin out

  2. #2
    NotSmall is offline English Rudeboy
    Join Date
    Aug 2004
    Concentric = contracting the muscle/lifting the weight.
    Eccentric = relaxing the muscle/lowering the weight.

  3. #3
    bluethunder is offline Anabolic Member
    Join Date
    Jun 2004
    Also,concentric=shortening of the muscle-eccentric=lengthening of the muscle. I might add there is also another principle called isometric action which neither lengthens nor shortens the muscle but the muscle is still activated & has force with no joint movement. Static holds & iso-tension techniques are some examples. Using a wall to support your back to do a bb curl and then holding the arm with no movement is a specific example. Other names are used such as "positives"(concentric) and negatives(eccentric). Increasing strength or breaking platueas can be helped by the proper use of negatives as the 1RM can be increased considerably.

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