Adult 1 Aged 1 Aged, 80 and over 1 Body Mass Index 1 Breast Neoplasms 1 Breast cancer survivor Cancer Survivors 1 Exercise 1 Fatigue 1 Female 1 Humans 1 Middle Aged 1 Obesity 1 Overweight 1 Physical activity 1 Single-Blind Method 1 Weight Loss 1 Weight Reduction Programs 1 Weight loss 1 adult 1 aged 1 body mass 1 body weight loss 1 breast tumor 1 cancer survivor 1 clinical trial 1 controlled study 1 exercise 1 fatigue 1 female 1