Slow things down and get a deep core workout with this variation on the traditional bicycle crunch. It adds resistance ... rotate your torso clockwise and pull your right knee back, then reverse ...

No matter which variations you follow, crunches have the advantage over sit-ups of being able to better target abdominal muscles. "Because the movement is smaller, you can control momentum more," ...

The same can be said of long-standing resistance training exercises and bodyweight movements like pull-ups, squats ... your feet into the air as you slowly bicycle kick to perform an exercise known as ...