Study
The researchers, who work at the University of Copenhagen, gave a group of mice unlimited access to a treadmill that the animals ran in for about 4-7 kilometres every day. The human equivalent of this amount of exercise would be about an hour working out in the gym. After the mice had been running every day for four weeks they were given an injection containing aggressive cancer cells – B16F10 melanoma cells. Two weeks later the Danes examined the mice. The mice in the control group did not run.
Results
The mice that had run [EX] had a much lower tumour volume than the mice in the control group [CON]. The mice that had run also had fewer metastases in their lungs.




Conclusion
Physical exercise protects against cancer. This is certainly true of more intensive forms of exercise, in which the muscles produce large amounts of inflammatory factors and the adrenals secrete large amounts of adrenalin. Although this animal study does not show that physical exercise actually stops cancer, the Danes do suggest that physical exercise can strengthen the effect of conventional cancer therapies. source:Cell Metab. 2016 Mar 8;23(3):554-62.
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