What is POTS and how does it impact Kristaps Porzingis’ availability with Warriors?

Fuente: New York Post

Kristaps Porzingis was healthy enough to accompany the Warriors on their current road trip, and he took another step in the right direction, returning to the court Saturday night against the Thunder. Before Saturday, the center had only played 17 of a possible 533 minutes since the Warriors acquired him at the NBA trade deadline. Despite his recent progress, his outlook remains a mystery.