The phrase "plank challenge" refers to a physical fitness activity where a person tries to hold a specific position called a plank for a set amount of time. It is a test of strength and endurance for the muscles in the body's core.
Sentences with «plank challenge»
Today we want to motivate you to try the 30 day plank challenge in order to strengthen your core muscles and tone up your abs. (fitnessandpower.com)