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Keywords

Adjuvant chemotherapy, Body composition, Breast cancer resting energy expenditure, Resting metabolic rate, Weight gain

 

Authors

  1. Campbell, K. L. PhD
  2. Lane, K. PhD
  3. Martin, A. D. PhD
  4. Gelmon, K. A. MD
  5. McKenzie, D. C. MD, PhD

Abstract

Weight gain is a commonly reported side effect of adjuvant chemotherapy. A change in resting energy expenditure during treatment has been a suggested mechanism for weight gain. We prospectively measured resting energy expenditure, weight change, and body composition (dual-energy x-ray absorptiometry) in 10 women undergoing adjuvant chemotherapy for breast cancer. There was no change in resting energy expenditure across cycles of chemotherapy (P =.78) or from baseline to the end of treatment (1,189.68 +/- 80.27 vs 1,205.76 +/- 56.71 kcal/d; P =.74). Overall, participants did not gain weight across treatment. However, there was an overall trend toward weight gain (66.3 +/- 5.1 vs 68.2 +/- 5.0 kg; P =.09), and participants did show an increase in total fat mass (24.2 +/- 3.8 vs 26.5 +/- 3.2 kg; P =.04), whereas muscle mass remained the same. Although no change in resting energy expenditure was seen, the observed increase in total fat mass is consistent with a decrease in physical activity level commonly reported with adjuvant chemotherapy treatment of breast cancer, and these body composition changes may have important health implications for survivors.