ExRx.net
http://exrx.net/forum/

Why internally rotate shoulders for dumbbell fly?
http://exrx.net/forum/viewtopic.php?f=7&t=10005
Page 1 of 1

Author:  fluoresce [ Sat Dec 03, 2016 4:40 pm ]
Post subject:  Why internally rotate shoulders for dumbbell fly?

For the dumbbell fly and lever seated fly, ExRx says that you should internally rotate your shoulders.

Why?

I thought it was to better isolate the pectoralis major; however, according to Wikipedia's Chest Fly page, if you internally rotate your shoulders, your anterior deltoids get more involved:

"The chest fly ... primarily works the pectoralis major muscles to move the arms horizontally forward. If internally rotated, it is assisted in this by the anterior head of the deltoideus in transverse flexion. If externally rotated, the contribution of the deltoid is lessened and the pec major is strongly emphasized as the transverse adductor."

Why, then, does ExRx recommend internal rotation? Have I misunderstood or something?

Here are the ExRx exercise pages:

exrxDOTnet/WeightExercises/PectoralSternal/DBFly.html
exrxDOTnet/WeightExercises/PectoralSternal/LVSeatedFly.html

Author:  stuward [ Sat Dec 03, 2016 10:07 pm ]
Post subject:  Re: Why internally rotate shoulders for dumbbell fly?

I don't know enough about this exercise to voice an opionion, however, Wikipedia uses this page for their source: http://www.fitday.com/fitness-articles/ ... t-fly.html However, that article doesn't even mention internal or external rotation. I wouldn't place any faith in it.

Author:  fluoresce [ Wed Dec 07, 2016 11:22 am ]
Post subject:  Re: Why internally rotate shoulders for dumbbell fly?

Thanks, Stuward. :-)

Page 1 of 1 All times are UTC - 6 hours [ DST ]
Powered by phpBB® Forum Software © phpBB Group
http://www.phpbb.com/