Motor-cognitive Training Effects on Cognition in Breast Cancer Survivors: the BRAINonFIT Study (BRAINonFIT).

Participants will complete a 5-month exercise program structured in 4 blocks of 5 weeks. Three supervised and combined aerobic/strength exercise sessions each week will be performed together with an aerobic weekly challenge. Aerobic exercise will be performed for 20-30 minutes using a treadmill, bicycle, or circuit training at light to moderate intensities (40-75% of heart rate reserve) during the first two blocks; gradually achieving high intensity (\>75% of HHR) in the last two blocks. Heart rate and the subjective perception of the exertion scale (6-20 Borg scale) will be monitored. Strength exercises will be started at light to moderate intensities (2 sets of 15-20 repetitions at 40-50% of repetition maximum), performed muscle actions at high intensities in the last two blocks (2 sets of 8-15 repetitions at 50-75% RM); using elastic bands, free weights, and weights gym exercises.

Participants will complete the same four-block exercise program in terms of type, frequency, intensity, and volume of physical/motor training. Simultaneous with the progression of physical/motor training, the complexity of cognitive stimulation will be increased according to the performance of the participants. General dual-task training will be performed, which describes the use of a physical/motor intervention with different cognitive stimulations (memory, language, intelligence, attention, processing speed, calculation, inhibitory control) that are not specific to the methods to be used for their assessment.

Participants randomly assigned to the health and wellness group will be advised and re-educated to support and improve health aspects. Participants in this group will aim to achieve the physical activity recommendations, and in addition, they will receive bi-weekly emails and phone call coaching with tools to empower patients with knowledge about physical exercise, nutrition, and brain health guidelines. Following completion of the 5-month exercise program, this group will receive an exercise program for 12 weeks.