Inclusion Criteria:  diagnosed with stage I-III breast cancer 18 years old can understand and communicate in the Norwegian language scheduled to undergo (neo-)adjuvant chemotherapy with a combination of taxanes and anthracyclines or only one of the treatments  Exclusion Criteria:  unable to perform basic activities of daily living cognitive disorders or severe emotional instability other disabling comorbidities that might hamper physical training (e.g. severe heart failure, chronic obstructive pulmonary disease, orthopedic conditions, and neurological disorders)