Using the same position as the single leg split squat, you'll at a little hop to the extension each time you come up. (thebettyrocker.com)
If you're really looking to put on some serious size and are willing to put in the work a 6 day push pull legs split could be just what you're looking for. (fitnesscrest.com)
As such, the push / pull / legs split routine on this page trains each muscle more frequently, and with higher volume, than the traditional 3 day version. (kingofthegym.com)