Exercise has been shown to reduce adverse outcomes related to breast cancer. However, the rate of adherence to physical exercise is very low among breast cancer survivors (BCS) Objective: This study investigated the effects of resistance training (RT), once a week, on changes in muscular strenght. Methods: This study analyses the effects of once weekly RT on fatigue levels among BCS. Randomized controlled trial. The 25 women included were randomized into RT or control group. The RT group performed eight weeks of RT (once per week). The group RT performed 8 weeks of supervised, with one trainer per volunteer. Muscle strength was evaluated by 10 repetition maximum (10RM) for leg press (45?) and brench press. Body composition was evaluated by dual-energy X-ray absorptiometry. A 1-way analysis of variance was usedto compare within-group effects at pre- and post intervention. An analysis of covariance test was used to compare postintervention values, using pre-intervention measures as covariates. The effect size (ES) was calculated by Cohen’s d. Results: Changes in body composition were not detected. Adherence to training was more than 99%. Conclusion: Once-weekly supervised RT could be an alternative to increase the adherence to exercise but not change in the body composition in BCS.
Keywords: breast cancer; anthropometrics measures; physical exercise.