Rosen C (@rosen) - Collective Profile | Tres Cantos, ES Follow @rosen_fitness on Instagram. Recent posts: a shirtless man wearing patterned swim trunks and sunglasses looks down at his phone. he is standing poolside with lounge chairs and plants visible in the background., a man in yellow swim briefs and a baseball cap poses on a sandy beach with the ocean in the background., a man runs on a path at night. the photo is slightly blurred, emphasizing motion., a man is shirtless, wearing a sheet mask. he is taking a selfie, showing off his muscular physique., a man is running in a park on a sunny day. he is wearing athletic clothing and appears to be working out., a man in sunglasses and briefs poses poolside, ready for summer., a man showers outdoors, his back to the camera. he is wearing a patterned swimsuit, surrounded by lush greenery., a man takes a mirror selfie at the gym, showing off his physique. he is wearing a red t-shirt and shorts., a man takes a mirror selfie in a locker room, showcasing his physique. he is shirtless and wearing swimwear., a man takes a mirror selfie in an elevator, showcasing his athletic physique. he's wearing workout clothes and appears to be heading to or from a gym session..