More is Not Necessarily Better

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Here’s what the science shows: physical activity reduces cancer risk independent of body weight. So, what’s going on, asked Henry Thompson, PhD, a researcher at Colorado State University.

Dr. Thompson spoke energetically about the possible compounds that may be released when muscles contract and the effects of these compounds on cancer development.

One of the more interesting findings: more is not necessarily better. Extrapolating from his lab’s animal studies, if you were to use the health recommendation of 30 to 60 minutes of daily physical activity, there was definite protection in the 50-60 minute range. When they went much above that, said Dr. Thompson, they saw a loss of some of that activity.

Even with all its benefits, Dr. Thompson reminded us that physical activity is a “stress” on the body. And to reinforce just how challenging this research area is, he points out that even rats and mice react differently to stress.

AICR’s ScienceNow recently conducted  a Q&A with Dr. Thompson.

And to see how much activity you need according to the federal guidelines, look here.

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    Dr. Barbara Rolls on the AICR Conference’s Session on Prevention Policy

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    Barbara J. Rolls, PhD is a Penn State researcher whose work studying the factors that influence how much people eat — and why — helped shape the development of AICR’s New American Plate.

    She spoke to us briefly about the AICR Conference session called “From Policy to Action in Cancer Prevention.”  (She also had some nice things to say about AICR.)

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      The Evidence is Clear: Activity Reduces Cancer Risk

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      It’s the last afternoon of the research conference and this session is all about physical activity. Tim Byers, MD, an epidemiologist at University of Colorado at Denver starts it off showing that some of the best evidence linking physical activity to lower cancer risk stems Snapshot_PAfrom AICR/WCRF’s 2007 expert report. The report conducted a systematic literature review of the evidence relating to physical activity and cancer risk. (Dr. Byers was a panel member on the report.)

      The last couple years have only added to the evidence linking physical activity to lower cancer risk.

      One of the more interesting findings, said Dr. Byers, was that physical activity was linked to substantially reducing cancer risk regardless of BMI. Physical activity – of all types — was found to reduce the risk of colon, breast, and endometrial cancers.

      Fun Fact: Washington, DC –where AICR’s research conference is happening – ranked as the number one fittest city in America, according to American College of Sports Medicine. Visit here to to see where your city ranks.

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