Despite his toned and muscular physique, “Supergirl” actor Tyler Hoechlin admitted that doing flying sequences as Superman is definitely a challenge.

“I wouldn’t use the word difficult,” Hoechlin told Entertainment Weekly when asked how hard it is to “fly” on the set of the CW series.  “[But] I would use the word painful after hour seven or eight.”

The 28-year-old actor explained that the harness that holds him while filming flying stunts is “not necessarily the most comfortable thing to wear” most especially in a long period of time.

“It really only holds you up with two straps and they go from the back part of your waist, through the legs, up to the front part of the waist,” he said. “So it’s just not the most comfortable way to be supporting your entire body weight for that amount of time.”

Benoist had similar experience when filming the first episodes of the series. At the Television Critics Association summer press tour last year, the 27-year-old actress said (via Nerdist) that doing flying scenes is “really difficult.” In fact, the “Glee” alum shared that there have been moments where she’s on a harness and people on set we’re like, “Try to look less concerned. You need to look comfortable.”

So in order to appear more comfortable while filming aerial stunts, Benoist has continued to strengthen her abs. In an interview with Variety in May 2015, the Texas-born actress shared that she’s been doing a lot of training for her role as Supergirl. “The wirework for training is mostly core work. It’s mostly ab-centric — the whole area of the body that nobody wants to work out,” she said at the time. “You have to get strong. You have to carry your whole body weight when you’re up in the air.”

Despite the challenges that come with doing flying stunts, both Hoechlin and Benoist conceded that there’s really nothing to complain about.

“At the end of the day, you’re flying around in a Superman costume — it’s really hard to complain,” Hoechlin told Entertainment Weekly.

“As difficult as it is, it’s just as much, if not more, exciting to feel like you’re flying,” Benoist added (via Nerdist).

“Supergirl” Season 2 premieres on Monday, Oct. 10, at 8 p.m. on The CW.