effectively training the core comes down to the three planes of motion: frontal, sagittal, and transverse. Consider this your ultimate cheat sheet of the most .
Basic crunches can't flatten your belly. Abs are one of the hardest body parts to train. To tone your abs, you need professional and scientific core muscle .
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We squatted, thrusted, and crunched, crunched, crunched to bring you the best abdominal-toning exercises on FitnessMagazine.com. Here are the ones we .