To compare the muscle performance of women with breast cancer during the treatment chemotherapy with apparently healthy women.
Analyze of muscle performance of women with breast cancer and apparently healthy women.
Vitor Marques1, Rafael Alves1, Thaynã Guimarães1, Weder Silva1, Paulo Gentil1, Claudio Lira1, Mário Hebling1, Carlos Vieira1
1. Federal University of Goias, College of Physical Education and Dance, Brazil.
Objective: To compare the muscle performance of women with breast cancer during the treatment chemotherapy with apparently healthy women. Methods: Participated the study 37 women separated into a control group (apparently healthy women) (age: 52,2 ± 13,11) and treatment group (women with breast cancer) (age: 55,8 ± 8,37) who were between the third and fourth cycle of chemotherapy. The muscle performance was evaluated through the isokinetic dynamometer Biodex system III, and the peak torque was analyzed by performing 2 sets of 4 repetitions of knee extension at 60º.s-1 in the concentric action, with 2-minute rest interval between the set. The normality of the data was tested with the Shapiro-Wilk test. Data were analyzed by t test. Significance level was set a-priori at P <0.05. We calculated Cohen’s d effect size from differences between control group versus treatment group. The obtained d values were classified as trivial (d< 0.2), small (0.2<d<0.5), medium (0.5<d<0.8), and large (d> 0.8). Results: There was no significant difference in peak torque between groups (p = 0.95, d = 0.02). Conclusion: Women in breast cancer treatment during the third and fourth cycles of chemotherapy did not present differences in measures of muscle performance when compared to apparently healthy women.
Keywords: cancer; isokinetic; chemotherapy treatment.