Strength Training for Osteoporosis Prevention During Early Menopause

Inclusion Criteria: * 45-60 years old. * Menopause status of peri- or early menopausal: stages -2 or -1 of the stages for reproductive aging 10+ staging system or are within 5 years of their last known menses. Exclusion Criteria: * Females who are pregnant or planning pregnancy within the next year. * Orthopaedic conditions that may be made worse with exercise. * Has low back pain, hypertension, lipidemia, diabetes, or cardiovascular disease. * Has a history of metabolic bone disease. * Has had an osteoporotic fracture within the last 5 years. * Had previous treatment with osteoporosis pharmacotherapy. * Has active glucocorticoid use. * Is currently participating in progressive resistance training or has in the previous 6 months. * Has low serum vitamin D (25(OH)D) \< 30 nmol/L or serum calcium \<2.10 mmol/L.