What Causes Muscle Growth?

In order for muscles to grow, three things are required:

1. Stimulus - exercise is needed to make the muscles work, use energy and cause microscopic damage to the fibers.

2. Nutrition - after intense exercise the muscles need to replenish their stores of fuel.

3. Rest - it is during the rest or recovery phase that the muscles repair the microscopic damage and grow.

Muscle size increases due to hypertrophic adaptation and an increase in the cross section area of individual muscle fibers. Intensive exercise impacts more on the strength influencing fast twitch type II fibers, therefore the increase in muscle size is accompanied by greater strength.

This will deplete the muscle's energy stores and cause microscopic damage to the muscle tissue. During recovery, these stores of glycogen and phosphocreatine will replenish from carbohydrates and creatine ingested as food or supplements. Amino acids supplied in the diet will trigger the protein synthesis that repairs the damaged muscle and lead to the creation of bigger muscle fibers.

To achieve continuous improvement you will need to keep reaching for higher levels of training intensity otherwise the improvement process will grind to a halt. Fortunately, this is relatively easy to plan for provided certain basic principles and rules are clearly followed. Subsequent articles in this series will examine these principles in detail.

In the meantime you can find out more about building muscle by visiting the site listed below.

Richard Mitchell is the creator of the bodybuildingadvisor.com website that provides guidance and information to athletes at all levels of bodybuilding experience. Go to Bodybuilding Advice to learn more about the issues covered in this article.

In The News:


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Updated : Fri, 25 Jul 2008 06:52:22 GMT

News in Brief - Ha'aretz

News in Brief
Ha'aretz - 7 hours ago
Israeli and Syrian officials will meet for a fourth Turkish-brokered round of talks in Turkey early next week, Saudi newspaper Al-Watan reported yesterday, citing diplomatic sources in Damascus.

Publ.Date : Thu, 24 Jul 2008 23:49:05 GMT

Stricter criteria for the state's graduates? - Seattle Post Intelligencer

Stricter criteria for the state's graduates?
Seattle Post Intelligencer - 1 hour ago
By JESSICA BLANCHARD New rules adopted Thursday by the Washington State Board of Education would strengthen high school graduation requirements by 2016 -- but they may not come to fruition unless the state Legislature provides more money for public ...
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US Expands Visa Program for Iraqi Allies - New York Times


Earthtimes (press release)
US Expands Visa Program for Iraqi Allies
New York Times - 58 minutes ago
By ALISSA J. RUBIN BAGHDAD - The American Embassy in Baghdad announced Thursday that it had expanded tenfold its program to help Iraqi employees of the American government here, who faced threats for their work, to obtain visas and ultimately ...
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Publ.Date : Fri, 25 Jul 2008 05:53:41 GMT

20 Questions for Steve Ballmer - PC Magazine

20 Questions for Steve Ballmer
PC Magazine - Jul 22, 2008
Microsoft's CEO faces a tough test this week as he prepares to face financial analysts. Before he gets to their questions, here are some of my own.

Publ.Date : Wed, 23 Jul 2008 04:03:44 GMT

4 Spitzer appointees accused of ethics violations - The Associated Press


New York Daily News
4 Spitzer appointees accused of ethics violations
The Associated Press - 8 hours ago
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Publ.Date : Thu, 24 Jul 2008 22:41:09 GMT

Diversity in news media could falter - USA Today

Diversity in news media could falter
USA Today - 5 hours ago
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Publ.Date : Fri, 25 Jul 2008 00:54:41 GMT

Heavyweights to Lobby for More Biofuel - Washington Post


Washington Times
Heavyweights to Lobby for More Biofuel
Washington Post - 1 hour ago
A group of the world's biggest agribusiness companies announced it will use lobbyists on Capitol Hill and national ads to build the case for fuels such as ethanol and biodiesel, even as grain prices climb worldwide.
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