Traveler stunned by man running laps inside Dublin Airport

This guy was flyin’ before he even got on the plane.

A traveler inside Dublin Airport claims he spotted a man getting a full-on workout in before departure.

“While down at the gate, I noticed a man in full running gear (tshirt, shorts, runners), running laps up and down the full length of the terminal passing in between passenger’s and their luggage while waiting to board their flights,” the supposed spectator, known on Reddit as Garychamp, posted to the site last week.

“The airport was also busy at the time so there was quite a lot of people about. The guy was sweating profusely while running — he was doing a significant number of laps around the area.”

Naturally, Garychamp had some questions before leaving the emerald isle.

“Has anyone else seen this before? Was the guy going to shower before getting in the flight? Imagine being stuck beside him for 6+ hrs on a flight!” he exclaimed.

The Reddit user added that the mysterious running man powered on for at least half an hour.

“Imagining this dude just [stenching up] a middle seat after running 26 miles,” one user commented.

“Just yesterday in Doha Qatar I saw a woman in full running gear doing laps of the (admittedly massive) terminal and wondered what on earth was going on!!” added another.

Airport running seems to be taking off as a worldwide trend — fitness enthusiasts who use workout apps such as Strava are posting routes within terminals.

One for the Dublin Airport — perhaps an explanation for the recent startling spectacle — spans about a fifth of a mile and has been attempted by more than a dozen travelers.

A user named Len K holds the best recorded time for the stint, at 1 minute and 24 seconds.

Earlier this year, Strava went viral for a micro-sprint route in the Denver Airport called “gate change gnar.”

For its part, Tokyo’s Narita International Airport opened a terminal designed like a running track in 2015, while the “cardio trail” at the BWI Marshall Airport near Baltimore consists of two loops in the terminal that are designated American Heart Association walking paths.