3D printing has applications in both medicine and fitness. In medicine, it allows for the creation of customized prosthetics and surgical models. However, there are also concerns about regulatory issues and the accuracy of 3D printed anatomical models. In fitness, 3D printing can help adapt exercise equipment for those with disabilities and improve equipment design, but it also has drawbacks like high costs and need for maintenance. Experts in both fields were interviewed for their perspectives on the benefits and challenges of 3D printing.