Do planks work the lower abs?

Planks are meant to engage the entire core, which includes the rectus abdominis, obliques, and transverse abdominis, for isometric stability ( 1 ). While they do contribute to overall core strength, they don’t specifically isolate the lower abs in the same way reverse crunches or leg raises do.

Do crunches hit the lower abs?

Typically, crunches target the upper rectus abdominal area by bringing the rib cage toward the pelvis ( 6 ). While there is some general activation of the entire core, crunches aren’t ideal if you’re looking to specifically target the lower abs. Reverse crunches, where the pelvis moves toward the rib cage, are far more effective for lower ab engagement ( 5 ).

Which abs show first?

Generally, the upper abdominal muscles (the top “two-pack” or “four-pack”) tend to become visible first as body fat percentage goes down. However, this is dependent on genetic fat distribution and the fact that many common ab exercises tend to emphasize the upper portion of the rectus abdominis ( 6 ). The lower abs are commonly the last to show due to continuous fat deposits in that area for many people. For more details about ab exercises on pull up bar , take a look at our prior publication.

How long should I plank for?

The ideal plank duration depends on your current fitness level. Your focus should be on form rather than duration. For beginners, holding a plank for 20-30 seconds with proper form is a good starting point. As your muscles become stronger, you can aim for 60 seconds. Beyond 60-90 seconds, it’s more beneficial to progress to more challenging plank variations (e.g. weighted planks, plank jacks, long-lever planks) or dynamic core exercises rather than simply extending the hold time indefinitely ( 6 ).