Evaluation of Muscle Strength and Muscle Mass in Patients With Inflammatory Bowel Disease

This study is measuring muscle strength and muscle mass in people with inflammatory bowel disease (IBD) — which includes Crohn's disease and ulcerative colitis. Researchers want to understand how IBD affects muscles, using grip strength tests and ultrasound imaging, and will also look at CT scan images. **You may be eligible if...** - You are 18 or older - You have a confirmed diagnosis of Crohn's disease or ulcerative colitis - You have had an abdominal CT scan in the last 6 months - You are able to have ultrasound muscle measurements and grip strength testing - You can provide written consent **You may NOT be eligible if...** - You have a known muscle disease or nerve-muscle disorder - You have a major orthopedic condition (like a severe joint or bone problem) affecting your grip strength - You are pregnant - You have a hernia or other abdominal wall condition that would interfere with ultrasound - Your medical records or imaging data are incomplete Talk to your doctor to see if this trial is right for you.