by Jessica Smith, REDBOOK
Good news! You never have to do another crunch again. The best move for flat, pulled-in abs is the plank. (To do a plank, get in push-up position and lower your arms so your elbows rest on the ground. Brace your abs in tight towards your back and engage your whole body by pressing your shoulders down your back and squeezing your legs together. Hold for 45 seconds and be careful not to arch your back).
Here are three reasons a plank is more beneficial than a crunch:
1. The plank does more for your abdominal muscles.
"A plank is superior because it causes a natural bracing/engagement of all four of your abdominal muscles (the transverse abdominis, rectus abdominis, internal and external obliques), whereas the crunch largely engages just one (rectus abdominis)," says Michele Olson, Ph.D., professor of exercise science at University of Auburn, Montgomery, who tested the effectiveness of the two exercises in the lab. In addition, the abdominalsRead More »from Flat Abs Faster: 3 Reasons to Stop Crunching