A plank is more difficult than it looks. You have to use all of your muscle groups, including your core, abs, arms, back, shoulders, glutes and legs. It’s normal to struggle to do a plank.

Dreaming of strong, defined abs? Looking for an exercise that goes beyond just aesthetics? We've got great news! Forget those ...

With the exception of the plank, each exercise should be done for 10-15 repetitions. If an exercise alternates between sides, perform 10-15 repetitions on each side. Try holding the plank for 15-30 ...

“You receive very similar strengthening benefits because you are engaging your muscles for the same amount of total time as if you just held the plank for 30 to 60 seconds without stopping ...