Annie Posted on February 23, 2019February 22, 2019 by A.D. 50-40-30-20-10 Double Under Sit-up Scale with 3x single unders Share this:Click to share on Facebook (Opens in new window)MoreClick to share on Pinterest (Opens in new window)Click to share on Twitter (Opens in new window)Click to email this to a friend (Opens in new window)Click to share on LinkedIn (Opens in new window)Like this:Like Loading... Related