Study of Aerobic Training for People Receiving Chemotherapy for Breast Cancer

o In Phase A (\~32 weeks), AT will consist of supervised walking delivered up to 7 days per week using an adaptive dosing schedule that starts at 90 min/wk and is escalated 30 min/wk every 2 weeks to a maximal dose of 300 mins/wk. In Phase B (\~20 weeks), AT will consist of supervised adaptive AT dosing in patients with a CRF Δ\<3.50 ml O2 .kg-1.min-1 from baseline to \~32 weeks, or unsupervised AT in patients with a CRF Δ\>3.50 ml O2 .kg-1.min-1 from baseline to \~32 weeks. Supervised AT will be monitored using TeleEx.

In Phase A (\~32 weeks), AT will consist of supervised walking delivered up to 7 days per week to achieve a cumulative total duration of: 90 min/wk (standard fixed dosing). In Phase B (\~20 weeks), AT will consist of supervised adaptive AT dosing in patients with a CRF Δ\<3.50 ml O2 .kg-1.min-1 from baseline to \~32 weeks, or unsupervised AT in patients with a CRF Δ\>3.50 ml O2 .kg-1.min-1 from baseline to \~32 weeks. Supervised AT will be monitored using TeleEx.