President Donald Trump is reinstating the Presidential Fitness Test. Here's when it last was used and why it's making a comeback.

President Donald Trump has reestablished the Presidential Fitness Test for American children. This test, a staple in schools since 1966, was phased out during the Obama administration.

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.