Many people do crunches to get abs. But crunches alone are not enough. Visible abs need a lower body fat percentage. Diet and overall activity are important. Core strengthening exercises are needed.

Don’t isolate your abs—integrate them with the rest of your body for a more effective, efficient, functional core workout!

A personal trainer shares the "tuck crunch" exercise as an alternative to planks if you want to build a strong and stable core while remaining low impact on joints.