President Donald Trump was joined by professional athletes on Thursday as he signed an executive order that will expand on his council on sports, fitness and nutrition, including by reviving the Presidential Fitness Test in public schools.

The test was conducted in U.S. public schools for decades until it was retired by the Obama administration. Here’s what to know about it and why Trump wants it back.

More than a decade after the nationwide tests were abandoned, Trump plans to measure school children's physical fitness.