To do a plank means to hold a position where you rest your forearms or hands on the ground, keep your body straight, and support your weight with your arms and toes. It is a common exercise for strengthening your core muscles.
Sentences with «to do a plank»
Side planks are the obvious way to do this but you can also do planks on an unstable surface. (cathe.com)
This time I painted it myself (I'm not usually the wall painter — go figure) but hubby did the plank wall for me. (frontporchmercantile.com)
You can keep your feet a little wider apart to help you stabilize when doing the plank punch (a). (dailyburn.com)