BCNA's State of the Nation Report launched today

This article:

https://womhealth.org.au/conditions-and-treatments/study-finds-exercise-reduces-breast-cancer-recurrence

states:

There are currently no clear indications of whether weight loss or the prevention of further weight gain helps prevent breast cancer recurrence, but a number of studies investigating this are currently underway.

and this article:

https://www.breastcancer.org/research-news/most-important-factors-to-reduce-recurrence-risk

which looked at the results from 67 studies on lifestyle factors and breast cancer recurrence. Overall, the researchers found that exercise had the most potential to reduce the risk of recurrence and improve survival -- exercise reduced the risk of dying from breast cancer by about 40%.

This article:

http://www.cmaj.ca/content/189/7/E268.full?sid=0beff45f-b9da-4256-bda1-2a5819a11112

concludes:

However, in a patient-level meta-analysis of randomized adjuvant studies, increased breast cancer mortality was observed only in the subgroup of heavier premenopausal women with estrogen-receptor–positive breast cancer.

One might then hypothesize that overweight patients who lose weight after a breast cancer diagnosis would have a better outcome. Although multiple studies have shown that weight loss, at least in the short term, is achievable in breast cancer survivors through a variety of strategies, there are few data on long-term outcomes.

The fourth article:

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4622557/

concludes:

Large randomized controlled trials are necessary to determine whether exercise can reduce the risk of cancer recurrence in Breast Cancer Survivors.