Exercise programs, particularly resistance training programs using weights or resistance bands, can help improve or maintain mobility and function in older adults, preserve independent living, and improve quality of life. This study will examine the safety and feasibility of a novel, higher intensity resistance training program in older adults, and compare the effects with standard care, lower intensity training. It is anticipated that both programs will be safe and feasible, but higher-intensity training will lead to greater improvements in quality of life, mobility and strength, which are part of the physical phenotype definition of frailty and markers of mobility disability.