… exercise dose in their own lives.” The study examined 11 breast cancer survivors from the Massachusetts General Hospital Cancer Center's Center for Breast Cancer ; … even be that low.” On the other side were women who saw negative consequences from not exercising enough - worsened fatigue, increased stiffness, and depressed … fatigue, your mood is better, your thinking is clearer. That's what we heard from these women,” said Wechsler. “But when exercise dose is too much, it's …