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Bodybuilding and muscle training questions

Updated on October 26, 2012

Suppose a person is lifting heavy weight slowly, then what will it activate, red or white fibers?

Whenever you move, your body will use all of one muscle. If I lift my arm out to the side, I'm using the entire deltoid. If I do push ups, I'm using the entire chest. However, I'm only using a % of the muscle fibers. Your red fibers are the first to be recruited in any activity. If you're eating, talking, walking, whatever, you're using the red fibers. They get used all day long, which is why they have the characteristics that they do - they need to with stand use again and again without failing or giving out.

When you do a really fast movement, you're using ALL of the muscle fibers. They are all activated to complete the activity. When doing a slow and light movement, only the red fibers are involved - until of course, they become exhausted. At which point, white fibers will get involved. But the point here is, lifting something heavy uses all muscle fibers. Lifting something heavy and slow still uses all muscle fibers due to the amount of weight involved, and the white fiber will always give out first, since the red fiber can simply last longer. You cannot target 2 separate muscle fibers by this means alone.

Let me be extra clear:

Heavy weight = all fibers are used.

Lifting fast = all fibers are used.

Lifting slow = red are used first.

Lifting light = red are used first.

Lifting heavy and slow = all fibers are used.

Lifting light and fast = all fibers are used.

You get the idea now? You can emphasize one fiber GROUP over another by lifting light and slow one day, then heavy and fast the next... but fast movements, or heavy movements, always require all fibers to come into play (or almost all fibers anyway).

Heavy weight = all fibers are used


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    • soni2006 profile imageAUTHOR

      Rajinder Soni 

      9 years ago from New Delhi, India

      Thanks for providing such great tips on how yoga can decrease eyesight defects.

    • pankaj3625 profile image

      Pankaj Pathak 

      10 years ago from Delhi

      Thanks for reading my blog.

      For the treatment of eyesight defects, one can go on the route for YOGA. It is helpful even in the cases where all other measures fail. Ancient Eastern culture (using yoga asanas) has provided us with various techniques to improve human vision; some of which includes, relaxing, pranayam, cleansing, eye muscle exercises, meditation, and mental vision.

      The main key to improve your eyesight is to keep yourself relaxed without any mental strain, but there are certain yoga exercises also.

      You should sit upright keeping your eyes open.Look at a point straight to your nose in front of you and then look at a point on the floor, but do not move your head. Without moving your head, roll your eyes upwards and downwards at least four times. Blink your eyes rapidly after the completion of this exercise.Now roll your eyes sideways, i.e., left and right. Blink your eyes rapidly after this too.Now roll your eyes diagonally upwards and downwards. Blink your eyes rapidly again.Then close your eyes for some time.After one week of this exercise, roll your eyes in a circular way like, top, right, down, left, etc.

      (0) This will help improve your eyesight. Do this for one month and see the results.

    • soni2006 profile imageAUTHOR

      Rajinder Soni 

      10 years ago from New Delhi, India

      Thanks for the appreciation BizzyMuse.

    • BizzyMuse profile image


      10 years ago from Southern California

      Very interesting hub! It gave me a better understanding of the process and benefits of the various types of muscle training. Thanks for sharing.


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