剛好最近BB有一篇文章談到如何訓練胸肌，裡面有一段談到這個問題
"Muscles are comprised of tens of thousands of fibers that run along the line
the muscle pulls, but they don't always run parallel to one another or the
entire length of the muscle," says David Sandler, CSCS*D, Director of Science
and Education for iSatori.
"For muscles that perform several functions and pull in different lines—such
as pennated muscles like the pecs—exercise variations must be performed to
activate all of the fibers.
"A particular exercise or angle of an exercise might not stimulate all of
them, at least not maximally. As the angle increases, it changes the fiber
activation pattern. Using the same angles in your chest workout—say the same
fixed benches on incline and decline movements—may not even hit some fibers.
That's why I'm a strong proponent of target training muscles at multiple
angles to ensure every muscle fiber is activated."
翻譯就不翻了，簡而言之就是改變角度在科學上是有意義的
這一點不只是針對胸肌訓練，很多大塊的肌群偶爾都可以改變角度練一下
台灣的健身環境比較偏向「經驗談」，很多事都是「我感覺」、「我聽說」、「我難過」
但相同的事已經講過很多遍了，人類的生理構造非常複雜
再加上基因、生活作息、營養等各方面問題
最後就是你的王道不代表套在我的身上還是王道
哪天說不定還有人會跑過來跟你說「我都不練肩膀，靠臥推就能練了」
「我都不練三頭肌，靠臥推就能練了」
但就算他真的肩膀大的跟球一樣、手臂比大腿還粗
也不代表你也可以像他一樣只靠臥推就有這種成果
最踏實的方法還是要自我實踐，練一陣子就回頭檢視成果
沒有達到目的就改，有效果就繼續
別人的練法再怎麼有效，那都是別人的事，參考參考就好