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Background: To determine the effect of resistance training volume on physical and perceptual outcomes of breast cancer survivors submitted to a combined training program. Design: Randomized single-blinded study. Methods: Nineteen breast cancer survivor women were randomized to a single-set (SS) or a multiple-set (MS) group. Both groups completed an 8-week combined training intervention in which the SS and MS groups performed 1 and 3 sets per resistance exercise, respectively. The following outcomes were assessed preintervention and postintervention: maximal knee extension dynamic strength (1-repetition maximum), quadriceps muscle thickness, peak oxygen uptake, time to exhaustion, cancer-related fatigue, and quality of life. Results: Both interventions increased knee extension 1-repetition maximum (SS: 29.8% [37.5%]; MS: 19.3% [11.8%]), quadriceps muscle thickness (9.4% [4.1%]; 8.9% [5.9%]), and quality of life (4.3% [6.3%]; 7.9% [9.0%]), with no difference between the groups. However, only MS improved cancer-related fatigue (−2.1% [1.7%]) and time to exhaustion (21.3% [14.9%]), whereas peak oxygen uptake remained unchanged in both groups. Conclusions: Cancer-related fatigue and time to exhaustion, improved only in the MS group after the intervention. On the other hand, similar knee extension 1-repetition maximum, quadriceps muscle thickness, and quality of life improvements were observed in breast cancer survivors irrespective of the resistance training volume performed.
Calonego https://orcid.org/0000-0002-4132-1148
Alberton https://orcid.org/0000-0002-5258-9406
Santagnello https://orcid.org/0000-0001-6261-2086
Schaun https://orcid.org/0000-0003-3339-714X
Petrarca https://orcid.org/0000-0001-6828-0756
Umpierre https://orcid.org/0000-0001-6953-0163
Portella https://orcid.org/0000-0002-1446-6747
Andrade https://orcid.org/0000-0003-3819-0690
Pinheiro https://orcid.org/0000-0001-5081-3083
Gomes https://orcid.org/0000-0002-5110-5529
Häfele https://orcid.org/0000-0002-9011-1366
David https://orcid.org/0000-0001-6886-5690
Henkin https://orcid.org/0000-0003-2909-1543
Pinto https://orcid.org/0000-0002-5827-5723
S.S. Pinto (tetisantana@yahoo.com.br) is corresponding author, https://orcid.org/0000-0003-4555-2717