Niall Horan Vomits During Gym Workout

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April 25, 2014 | 11:22am EST

One Direction star Niall Horan fell ill just hours before the start of the band’s world tour on Friday when a rigorous workout caused him to throw up.
The singer has been battling back to full fitness since undergoing knee surgery in January and he decided to team up with his personal trainer Jarvis for his first gym visit since the operation.
He was put through his paces at a fitness center in Bogota, Colombia ahead of the opening night of the tour on Friday, but the rigorous workout, combined with the high-altitude atmosphere, sparked a nasty bout of vomiting.
Horan later posted a photo of himself on an exercise bike at the gym alongside the message, “First session back with Jarvis! Knee feelin (sic) ok! Threw up because of the altitude, me and Jarv called it #altitudeoosshhh (sic).”