
Abdominal crunches are one of the most popular “ab exercises” around. It’s a movement that emphasizes upper abdominal strength. You start by lying on your back, typically with your hands behind your head and knees bent. You then lift your head and chest off the floor, “crunching” your upper body into a C-shaped curve. Over the years, many “experts” have dismissed this exercise, claiming it’s ineffective for core...






