A 41-year-old actress displayed her impressively muscular physique, a level of fitness that is even challenging for men to attain.

On December 14, Lee Si Young posted several photos on her Instagram with a short caption, "I guess I was a man." The photos captured Lee Si Young, who had recently filmed season 2 of the Netflix original series 'Sweet Home.'

She is seen with short hair and focusing on maintaining her muscular figure throughout the filming by lifting weights and exercising in between filming. She showed off her broad shoulders and well-defined arm and back muscles.

In particular, Lee Si Young impressed viewers and fans with her toned figure in Season 1 of the popular series. Many thought her back muscles were edited through computer graphics at that time.

During an interview during that time, Lee Si Young revealed that her muscles were not touched up by CG, but she had worked out extensively to obtain her figure. She explained, "The character is a former special forces firefighter, so I focused on bulking up rather than having a lean body." She added, "I asked my trainer how I can show my muscles more prominently and my trainer said I should have 8% body fat. So I matched that number. I learned about new muscle groups while working out. People were saying (the muscles) were CG but it wasn't CG."