51–55 of 55 posts
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>A sedentary 40 year old looks and feels 20 years older than a 40 year old athlete. This is a completely unsubstantiated claim.
you want a randomized study? :D
Results from the source study abstract[1]: " A total of 1.44 million participants (median [range] age, 59 [19-98] years; 57% female) and 186 932 cancers were included. High vs low levels of leisure-time physical activity were associated with lower risks of 13 cancers: esophageal adenocarcinoma (HR 0.58, 95% CI 0.37-0.89), liver (HR 0.73, 95% CI 0.55-0.98), lung (HR 0.74, 95% CI 0.71-0.77), kidney (HR 0.77, 95% CI 0.7…
Phew, 186 thousand cancers included out of 1.4 million participants? I knew cancer was not entirely uncommon but... man. That's a lot of unhappy news. Feels bad to think about. If it is true that exercising regularly reduces the risk of cancer, I wonder what the mechanism is? Exercise builds muscle mass, improves lung capacity... Why would that have anything to do with cancer?
Few times since I could notice that in lesser scales.
Maybe increase blood flow, increased metabolism, endorphins, etc do help keeping your system active instead of going in suspend mode while the immune system reacts alone.
Just yesterday I had this metaphor of biology being a gyroscope, the more it spins the more it can dodge.
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>> (HR 0.58, 95% CI 0.37-0.89) Can someone explain the numbers? I read it as risk, sub-population, error margins. Is that right?
HR stands for Hazard Ratio. 0.5 would mean something is half as likely as for the control group, while 2 would mean twice as likely. 0.37-0.89 is the confidence interval at 95% confidence. So it's expected that if the study were repeated many times, the HR would appear to be within that (rather wide) range 95% of the time. This time it's 0.58. The main thing is that the upper bound 0.89 is quite a bit less than 1, so…
I think it's pretty obvious. I believe that it is not that exercise helps, but sedentarism is poisonous. A sedentary 40 year old looks and feels 20 years older than a 40 year old athlete.
actually a 40yr old athlete that has already more than 20 year of athlete life behind will have a body in a much more bad shape than a guy who had regular walks and healthy diet.