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Hi, i'm just a beginner but I have been running on my treadmill every morning Mon-Fri for 20 mins at between 6-7 mph (mainly 7) for the last year or so and have noticed recently that my legs have started looking a lot thicker.
Could this be due to the running or something else and if so would continuing to run/changing my technique slim my legs down again?
Any help would be much appreciated.