# Anatomy Question

**URL:** <https://boards.straightdope.com/t/anatomy-question/170652>\
**Category:** Factual Questions\
**Created:** [April 23, 2003, 6:38pm UTC](https://boards.straightdope.com/t/anatomy-question/170652 "2003-04-23T18:38:03Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Fuel](https://avatars.discourse-cdn.com/v4/letter/f/df705f/32.png) [@Fuel](https://boards.straightdope.com/u/Fuel)\
**Post date:** [April 23, 2003, 6:38pm UTC](https://boards.straightdope.com/t/anatomy-question/170652/1 "2003-04-23T18:38:03Z")

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1. In weightlifting, does using a thumbs-up grip to do **side dumbell raises** work the front (lateral?) delt more and does using a thumbs forward grip work the the side (medial?) delt more and does using a thumbs down grip work the rear delt more?

2. Also, same question for front raises.

3. Also, same question for front and side raises, but with a palms-up grip.

All these questions should be proceeded with a, “To what degree?”. My guess is it doesn’t make a huge difference, but then again, sometimes it doesn’t take a huge difference in training to make a huge difference in muscle growth.

1. Also, what is the most stable anatomical shoulder/arm position for front and side raises?

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**Author:** ![USCDiver](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/uscdiver/32/354_2.png) [@USCDiver](https://boards.straightdope.com/u/USCDiver)\
**Post date:** [April 23, 2003, 8:52pm UTC](https://boards.straightdope.com/t/anatomy-question/170652/2 "2003-04-23T20:52:23Z")

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Well, from a strictly anatomic viewpoint, the deltoids do not attach to the forearm. So pronating or supinating your forearm shouldn’t affect the deltoid contraction.