Kaley Cuoco has been hiking up hills and calling herself "basic" while showing off her gym-honed body in skin-tight spandex. The 35-year-old Big Bang Theory alum, still in the news as Season 2 of HBO Max series The Flight Attendant ramps up production, spent the weekend in the great outdoors, taking with her some of her co-stars and uploading snaps from the outing to Instagram.Posting for her 7 million followers on Sunday, Kaley called the gang a "couple of nerds." Check it out below.Calls Hike 'Zero Fun'Scroll for more photos. Kaley, regularly kidding that her intense sweat sessions with personal trainer Ryan Sorensen are a living hell, was back to her joke-complaining. The blonde, saying today's "hike was zero fun," posted fun snaps of herself and The Flight Attendant co-star Zosia Mamet, plus a male pal.Wearing a baseball cap, a slightly cropped black tank, plus clingy matching leggings, the girl behind Penny flaunted her toned arms and shoulders, but the vibe was more goofing around than hard-core cardio.'Victory' HikeAdding: "Hike more, worry less" in gif text, the actress continued: "Also yes, Z and I work together all week and then spend our weekends together. We are joined at the hip." Zosia, returning for Season 2 of November 2020-released thriller The Flight Attendant, plays Kaley's on-screen BFF and lawyer Annie on the series.Sending out a big grin while still with her pals, Kaley also shared a shot of the threesome, writing: "BUT ALL IN ALL A TOTAL VICTORY!" as she reposted from Will Von Vogt.Hanging Tight With Co-StarsEarlier this month, Kaley made headlines for sharing behind-the-scenes sneak peaks of Season 2 of her series, ones including BFF Zosia."Another week in the can alongside my amazing cast and crew @flightattendantonmax ✈️ season 2 👩✈️ 🥂 💙," she wrote. Kaley also produces the series via her Yes, Norman Productions, a company named after now-deceased Pit Bull mix Norman.Cuoco has been opening up on her Cassie Bowden character, a hot mess flight attendant caught up in a murder mystery after a one-night-stand.Playing Ten Characters In OneSpeaking earlier this year, the actress revealed: "This is someone who is her normal self, when she’s slowly basically medicating herself all day long. And it’s only when all that is taken away is when she starts to fall. I figured, well, I think she’s normal until it’s truly gone. That’s her main line."Kaley added: "She’s been an actor’s dream, because I feel like I played ten characters in one." The Flight Attendant also features Kaley's 32-year-old sister Briana Cuoco.