19 Core-Strengthening Exercises
Have a Weak Core? Here Are 19 Strength Moves You Need to Do, Stat
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"The crunch is a good core exercise that also helps you build muscle," Tate told POPSUGAR. "The crunch isolates the ab group, making it the primary focus . . . This exercise is very popular with assisting people in building not only core strength but also muscle strength and definition."