Excerpt from Reuters Sept 23, 2015
For people diagnosed with cancer, the risk of cancer death falls as physical activity rises, according to a new analysis of more than 70 existing studies.
The researchers included 71 studies of physical activity and cancer death risk in the general population or among cancer survivors.
When they pooled these results, people in the general population who got at least two and half hours of moderate activity like brisk walking, per week, were 13 percent less likely to die from cancer than those with the lowest activity levels. (That’s about 21 minutes per day of brisk walking)
They also looked at data in terms of MET-hours, a measure of the relative amounts of energy expended in given activities and time spent doing them. Resting represents 1 MET, while a 4-MET activity like brisk walking uses four times as much energy, according to the U.S. Office of Disease Prevention and Health Promotion. Doing a 4-MET activity for 30 minutes equals 2 MET-hours.
Cancer survivors who completed at least 15 MET hours per week of physical activity were 27 percent less likely to die from cancer. (That’s about 4 hours per week or 35 minutes per day of moderate intensity exercise like brisk walking)
Exercise may change the body’s response to cancer, and those who exercise more may live healthier lifestyles in other ways as well, Liu said.
But many of the high-quality studies included in this analysis accounted for other healthy-lifestyle factors that may have played a role, Liu noted. (Like dropping bad habits and eating tons of fruits and vegetables)
“Physical activity, mostly before diagnosis, and breast cancer mortality has been studied for decades, but only in the last 10 years or so have we been studying physical activity after diagnosis,” said Patrick T. Bradshaw of the University of California, Berkeley, who was not part of the new study.
“Other cancers (e.g. colorectal, ovarian) have been studied much less than breast cancer, but some researchers there have also found a reduction in mortality associated with increasing physical activity levels,” Bradshaw told Reuters Health by email.
Leisure time physical activity or recreational physical activity, but not occupational activity, is protective against cancer according to most research, Liu said.
“The take-home message here is encouraging – exercise may be beneficial even if started after diagnosis,” Bradshaw said.
“Based on huge evidence of the inverse association between physical activity and cancer mortality, there is no doubt that cancer patients should be physically active,” Liu said. “We suggest that cancer patients to consult their doctors about a personalized physical activity plan, including exercise time, exercise frequency, exercise mode and so on, which may help to promote the survival of patients without bringing too much physical burden.”
[End of article]
Rebound exercise was an integral part of my daily anti-cancer exercise routine. It’s the best exercise for your immune system. More about rebounding here.
Rebound, walk, run, bike, climb, surf, ski, lift weights, do yoga, karate, pilates, jazzercise… just move your body 30-60 minutes every day!
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