Inclusion Criteria:  Premenopausal women aged 18 to 45 diagnosed with Systemic Lupus Erythematosus according to SLICC criteria; Medical indication and prescription for glucocorticoid pulse therapy; Access to Internet and any device that allows for participation in exercise training online lessons (such as smart phone, laptop or personal computer); Willingness to participate in an exercise training program.  Exclusion Criteria:  Any physical, mental, neurological or musculoskeletal health impairment that contra-indicates exercise training. Use of medical therapy that alters bone metabolism, such as bisphosphonates, teriparatide and denosumab; Receiving prescription for multiple glucocorticoid pulse therapies mid-intervention; Being currently enrolled or having enrolled in a structured exercise training program in the last 6 months (defined as at least 2 planned, structures sessions of exercise training per week); Having a vertebral fracture at the moment of enrollment (identified by Vertical Fracture Assessment), or high risk for fracture (defined as low hip or spine bone mass [z-score < -3] or history of fragility fractures).