Cystic Fibrosis (CF) is a genetic condition affecting the lungs and other organs. This study looks at body strength and muscles in people with CF. It checks different body measurements and compares them to a special X-ray test called DXA (Dual Energy X-ray Absorptiometry), which shows how much of your body is made of fat, muscle, and bone. The study also looks at how nutrition and body changes affect people with CF and how feelings and medical conditions might play a role in nutrition problems.

• The study involves comparing people with different lung function levels.
• No new treatments or surgeries have been started recently.
• Some people, like those with pacemakers, can't join the study.

Participants are grouped based on lung function, using something called FEV1 (Forced Expiratory Volume in 1 second), which measures how well you can breathe out. The study is for adults with CF who haven't had certain medical treatments or surgeries recently. The study's goal is to learn more about how body and nutrition changes affect health in CF patients.