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Concentric
No they are not
pectoralis major
Pectoralis minor.
Let me know about the usage of Eccentric and Concentric pipe intersection in oil and gas industry? What are the major differences and concerns about Eccentric and Concentric pipe intersection in oil and gas industry?
In Resistance Training, concentric and eccentric contractions are two movements done by opposing muscles. Eccentric contractions are said to cause delayed onset of muscle sorennes( DOMS).
pectoralis major and pectoralis minor
there are two muscles with pectoralis in their name, Pectoralis Major and Pectoralis Minor. Pectoralis Major is the main muscle of the chest and pectoralis minor is deep to it (so you can't feel it because pectoralis major completely covers it)
muscular friction
Concentric and eccentric movements.
It's the Pectoralis Minor!
eccentric on the way down concentric on the way up