Enhanced Rehabilitation After Major Trauma (PROPERLY)

Inclusion Criteria: * Participants over 18 years old * Registered GP in Greater Manchester or Greater Manchester Resident. * Polytrauma or one or more complex /severe isolated injury * Rehabilitation goals (e.g., mobility, function, job retention/ return to work) identified using shared decision-making process * Patient able to enter programme 6-30 months post injury. * For the ERP patients willing to travel to the MIHP for their evaluation and treatment twice a week. * Participants with lower limb injuries that continue to have functional impairment. * Participants deemed well and safe enough to participate by clinical teams. * Normal ECG if previously reported to have abnormal ECG * Participants willing to consent to follow up over 12 months * Participants with the capacity to consent to the study. * Fully healed wounds and bone healed sufficiently to allow at least partial weight bearing Exclusion Criteria: * Participants under the age of 18 * Participants unable to provide informed consent * Participants with multiple pre-existing comorbidities that affect ability to participate in enhanced rehabilitation such as cognitive impairment, unstable angina. * Central motor neurological impairment affecting ability to participate in an enhanced rehab programme * Absence of functional disability affecting gait and / or function. * Plans for further surgery that will impact on gait or function.