CHELSEA — They ran out of energy.
Energy Kitchen, the health food chain aimed at fitness buffs, has closed all nine of its locations across the city, according to a message posted on the restaurant's website.
The restaurants were shuttered on Monday, according to fans, leaving calorie-counting lunch-goers in a lurch. The chain had locations in Chelsea, Hell's Kitchen, Midtown and the Upper West Side, along with a spot at St. John's University in Queens.
"We have made the difficult decision to close all of our NYC and Long Island locations — so it’s time for Energy Kitchen to say good-bye to all of our loyal customers," the chain wrote in the online message.
"Thank you so much for your support over the years — it has been our pleasure to serve you!"
The chain served burgers, wraps, sandwiches and smoothies, and pledged that all of its menu items were under 500 calories.
Two locations, one in Montvale, N.J. and the other in Virginia, will remain open.
On Energy Kitchen's Facebook page, dozens of fans lamented the chain's closure.
"Why?" wrote one fan, Rich Lee. "Where will we order our healthy food from?"
"Wow. Wow. Wow. Tragic," wrote another fan, Paula Resley.
The chain's owners did not immediately respond to a request for comment.