Below is a link to a great blog from Meaghan Shea. Guess I am no longer the lone heretic. Everyone says we don’t have research basis for our ideas. This is great. Even though the cart was a little ahead of the horse it’s still good news. I think after you read this my single leg theories will make even more sense. It’s important to note two things. One, to Brett Contreras’ dismay the study did not look at glute EMG. My guess is that glute EMG is higher in the single leg version. The other factor is that the higher hamstring activity shows a higher posterior chain load which is another positive.
http://www.fitnessmash.com/2010/04/the-controversy-continues/
Michael Boyle's Strengthcoach.com Blog 