Rainbow's Woori seems to have worked up quite a sweat with an exercise ball at the gym.

Woori tweeted on the 8th, "Please save me. Exercising is too difficult," as well as the hilarious photo below.

The idol can be seen collapsed onto an exercise ball with her hands and feet on the floor for support.

Fans commented, "You shouldn't exercise up to that point", "Girls groups have it hard. They always have to exercise", "Her body line looks good", and more.