When you’re working your core, you don’t always have to isolate one single muscle to get focused results. Sometimes, attacking multiple muscle groups can be just as challenging. This maneuver from Men’s Health fitness director Ebenezer Samuel, C.S.C.S. takes major…

When you’re working your core, you don’t always have to isolate one single muscle to get focused results. Sometimes, attacking multiple muscle groups can be just as challenging. This maneuver from Men’s Health fitness director Ebenezer Samuel, C.S.C.S. takes major…