RecruitingBehavioural interventionPrehabilitation Exercise Training in Multiple Myeloma Patients Undergoing Autologous Stem Cell TransplantationThe goal of this research study is to investigate whether a virtual, home-based, prehabilitation aerobic and resistance exercise (PARE) training program implemented 8 weeks prior to receiving autologous stem cell transplant (ASCT) for multiple myeloma participants will improve muscular strength, physical capacity, patient reported outcomes, and cardiometabolic health outcomes. The names of the study interventions involved in this study are: * Prehabilitative aerobic and resistance exercise (PARE) (virtually supervised 8-week aerobic and resistance exercise program) * Waitlist control (8-week normal activity behavior)