Irish heartthrob Niall Horan has revealed to his Twitter followers that the band's new stage for their upcoming Where We Are tour is so huge that he needs to up his stamina in order to run from one side to the other. 

Writing on the social networking site this evening, the 'One Thing' superstar explained that he needs to get into better shape so that he can perform comfortably during the jaunt: "Just been for a cycle! Gotta get fit! No other option, that stage is huuuuuugggeeeeee."

One of Horan's fans then told him to "do lots of cardio to get your stamina up" and he replied, adding "exactly". Earlier this week, he teased Directioners by confessing that they'll have a shock when they see the new stage set-up: "You guys are gonna get a serious shock when ya see the stage for the tour! It's absolutely huuggggeeee."

One Direction had their first half-show run through tonight and Horan returned to Twitter to add that it went incredibly well and has made him even more excited to hit the road: "Just ran half the show with the band! This is when it gets really exciting! Can't wait now."

Watch the band's promo video for their new fragrance, entitled That Moment, below: