Once a Week Resistance Training Improves Muscular Strength in Breast Cancer Survivors: A Randomized Controlled Trial.
Wanderson Divino Nilo Dos SantosAmilton VieiraClaudio Andre Barbosa de LiraJoão Felipe MotaPaulo Roberto Viana GentilRuffo de Freitas JuniorClaudio Luiz BattagliniMartim BottaroCarlos Alexandre VieiraPublished in: Integrative cancer therapies (2020)
Background: 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). This study investigated the effects of high supervision ratio resistance training (RT), once a week for 8 weeks, on changes in body composition and muscular strength in BCS. Methods: Twenty-five female BCS undergoing hormone therapy were randomized into resistance training group (TG, n = 12) or control (CG, n = 13) group. The TG performed 8 weeks of supervised RT, with 1 trainer per volunteer, once a week. Body composition was evaluated by dual-energy X-ray absorptiometry, and muscle strength was evaluated by 10 repetition maximum (10 RM) for leg press (45°) and bench press exercises. A 1-way analysis of variance was used to compare within-group effects at pre- and post-intervention. An analysis of covariance test was used to compare post-intervention values, using pre-intervention measures as covariates. The effect size (ES) was calculated by Cohen's d. Results: The TG improved muscle strength in 10 RM leg press (45°; Δ 33.75 ± 11.51 kg, P = .02; ES = 0.96) and bench press (Δ 4.08 ± 1.83 kg, P = .01; ES = 1.15). Adherence to training was more than 99%. Changes in body composition were not detected. There were no changes in the CG for any assessment. Conclusion: Once-weekly supervised RT could be an alternative to increase the adherence to exercise and improve muscular strength in BCS.
Keyphrases
- resistance training
- body composition
- dual energy
- bone mineral density
- randomized controlled trial
- computed tomography
- placebo controlled
- machine learning
- double blind
- image quality
- high intensity
- open label
- glycemic control
- high resolution
- phase iii
- contrast enhanced
- type diabetes
- stem cells
- gestational age
- physical activity
- phase ii
- metabolic syndrome
- mass spectrometry
- magnetic resonance
- bone marrow
- atomic force microscopy
- adipose tissue
- childhood cancer