THE 30-DAY PLANK CHALLENGE

Welcome to the 30 Day Plank Challenge! You are awesome! Each day, for the next 30 days, you'll be planking. Each day the time spent performing each plank will increase, helping you build a rock-solid core. Guaranteed! Don't worry, there are rest days too. Only do the amount of time shown on the challenge chart once per day; however, if you are ... ................
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