Hip extension in coitus

[Brandon Oto]

In your professional opinion, should the glutes or the hamstrings be the dominant muscles used for pelvic thrusting during sex?

This is obviously completely ridiculous, but now that it's occurred to me I can't stop freaking wondering about it...

[Mark Rippetoe]

I find it quite hard to believe that this could possibly be relevant to your situation, Brandon. You're obviously just interested in this from a theoretical standpoint. It has been my experience that the glutes and hamstrings work together quite well, in just about every situation.

[sasquatch989]

This would be easier to answer if you could supply pics/vids. kplzthnx

[LCN]

How about "in your case they're both just used isometrically" for a zinger?

[Konstantinos Kavos]

I quote myself:

I guess a powerful posterior chain could help a bit with the pushin', but it's much more fun to let her do all the work anyway. That's why men have backs, so we can lie on them. Leaves hands free too.