We don’t need to remind you it’s swimsuit season. Time for itty-bitty bikinis, crop tops and sundresses with midriff cutouts. If your midsection looks more like a keg than a six-pack, there’s one guaranteed exercise to make your midsection slim and trim—planks.
As HuffPost columnist Barbara Hannah Grufferman writes: a plank workout “tones and strengthens every part of the body: legs, back, arms, shoulders, abdomen, hips, butt. It’s the one thing I do every single day, even if I have no time to do anything else.”
