Question: how many 1 minute planks should i do?
Answer: As a general guideline, Doug Sklar, a certified personal trainer and founder of PhilanthroFIT in New York City, recommends striving to do three sets of up to 60 seconds. “It's OK to start with shorter sets and work up to 60 seconds,” he says. Plus, shorter planks can still give you a solid workout, Sklar says.