Exercise-based Frailty Intervention in Lung Transplantation (XFIT)

The goal of XFIT study is to measure the safety of an 8-week telehealth-delivered exercise and behavioral training program to treat frailty in lung transplant candidates in their own home. The main questions XFIT aims to answer are: * Is XFIT safe? * Is XFIT feasible and acceptable by participants? * Is XFIT effective in improving frailty and physical function as reflected in patient-reported outcomes. Participants will: \- Participate in the 8-week XFIT program or enhanced standard of care