Controlled, randomized, open, prospective, multicentric study, 214 volunteer patients aged between 18 and 70, with breast cancer, at the start of TAXOL treatment, possessing a smartphone, will be recruited and randomized into two groups:
107 in the control group (smartphone application "placebo" = number of steps) 107 will be equipped with the application "Bouge" = coached group
For three months, the patients do their daily physical activity. The "coached" group, through the smartphone application "Bouge", receives computer coaching to increase their physical activity (no direct medical intervention, only notifications and computer pusch).
The control group is not coached by the application (simple display of the number of step)
