Cancer research: Brisk walking can reduce recurrence of breast cancer

Breast cancer threatens a large number of people the women the world over, and even though the condition is treatable, it is still a major issue. The other worry is that even when it is treated, there is a threat of the breast cancer recurring; some woman who face a high risk of breast cancer have been known to have a healthy breast removed after they have been treated to reduce the risk. Now, research has shown that exercise is a factor in the reduction of the risk of recurrence of breast cancer (link to article):

Thirty minutes of brisk walking every day can significantly reduce the risk of breast cancer recurrence, according to a new study. “Brisk walking - about 3.0 mph on a treadmill - for three to five hours per week, or about 30 minutes a day, can net big benefits for breast cancer survivors,” said Dr. Carolyn Kaelin, a Harvard surgeon, breast cancer survivor and author of The Breast Cancer Survivor’s Fitness Plan.
Recurrence rates and deaths from breast cancer decreased by 40 percent among those who exercise at least 3-5 hours per week, compared with those who were sedentary,” said Kaelin. “It does not need to be running a marathon, or biking a century, but rather simply walking briskly most days on a treadmill, at a shopping mall or around a track, that further reduces breast cancer recurrence for those who have been treated for the condition.

And of course, any kind of exercise such as brisk walking reduces the other health problems associated with a sedentary lifestyle such as cardiovascular problems, obesity, helps bring diabetes under control, and so on.

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Cancer Research: Low oxygen level indicates recurrence of prostate cancer

For some time now, researches have been studying the link between low oxygen zones in prostate tumors, and the probability of recurrence of the cancer. Studies have made the connection that low oxygen zones are linked to the increased resistance to radiation among solid tumors. The study, if taken forward, can help in determing the amount of radiation levels (including increasing the dose) for treating patients whose tumors show such signs of oxygen resistance (and help in ensuring that the cancer is eliminated and does not come back) (link to article):

She says that the current study reinforces the preliminary findings of the six research papers published between 2000 and 2002, which detailed the link between low oxygen in tumours and the risk of increased prostate-specific antigen (PSA) levels.
The study showed that eight of the 57 patients experienced an increase in PSA levels following prostate cancer treatment, defined as an increase of 2 Ng /ml above the lowest PSA reading following Brach therapy. Overall, average muscle oxygenation was 12.5 times higher than that of the tumour. The researchers used a statistical model that accounted for such risk factors as tumour grade, PSA level and tumour size and determined that low oxygen was a significant independent predictor of an increase in PSA levels.