Here is one leukemia patient that is keeping her optimism in shape.Elizabeth Bobbe was shocked to find out that she had cancer after passing out in a parking lot earlier this month. She had been teaching two aerobics classes for her job as a fitness instructor in Winchester, Calif. After being transported to the hospital, Bobbe was diagnosed with acute myeloid leukemia. She has to stay in the hospital while undergoing chemotherapy, but the determined 29-year-old has found creative ways to stay in shape, including challenging the hospital staff to a squat challenge.In the video above, Elizabeth leads the challenge as one doctor and five nurses from the oncology staff at Loma Linda University Medical Center try to keep up. David Bobbe, Elizabeth's dad, says that the fitness instructor's positive attitude has been very inspirational to hospital staff."Elizabeth has an amazing attitude, I'm not exaggerating when I say, she has not ever expressed feeling sorry for herself even once," David said. A GoFundMe page has been set up by Elizabeth's family to help pay for her medical costs while she's receiving treatment."The doctors, nurses, physical therapist, lab techs, nutritionist and all of her family are blown away by Elizabeth [sic] amazing attitude. She comforts us when we are down," David said.