Comedian Kim Ji Sun has received her certification to be a personal trainer.

Kim Ji Sun appeared on the September 22nd episode of SBS's 'Star King' where, in the middle of the greatest body segment, she showed off her certification.

Although she has a sexy and flexible body, she had also studied hard to receive her certification from the United States Personal Trainers Association.

Her trainer, Lee Young Man, had been a big help for Kim Ji Sun. "She already had great muscles but they developed even more.  She is very sincere and hard working," he said.

"After working out and making my body, I felt that I should help others work out too.  Instead of working out just by myself I like working out with my children," Kim Ji Sun said, sharing that she works out while playing with her children on the swing set.

Source: Star Today via Nate News