Stand with your feet hip-width apart, knees slightly bent, and your hands behind your head. Keep your lower abdominal muscles pulled in and tight
Standing helps you enable your core and legs simultaneously, activating the entire body," explains Murdock. "Start by standing with your feet shoulder-width apart.
Slowly lift your right arm over your head. At the same time, you'll want to bring your right knee up to meet your right elbow (as close as possible). This action engages your oblique muscles.
Dumbbell halos are fantastic for tightening your core while building shoulder strength. "Not only is this move good for your core, but it's also ideal for the upper back and shoulder
Another killer standing ab exercise, reverse twist lunges engage your quads, glutes, and obliques, creating a powerhouse move for your lower body.
This move's twisting action allows the center of the body to get a little extra attention by firing up the obliques and challenging your core stability.