News
But crunches target just one of those muscle groups, so it's best to do your crunches as part of a larger, well-rounded core ...
so it's best to do your crunches as part of a larger, well-rounded core routine that works all of your abdominal muscles. Along with the abs, the core is made up of many other muscles in the trunk ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results