For half a year now I commute to work by bike everyday. It's 30 km each day, about 18.5 miles. I have a good bike, it's comfortable as well as it has good components so I'm having fun riding it. However I found myself wondering about long term effects of riding a bike so often (in average I cover 150 km a week on it).
Considering positive effects I realized my fitness improved a lot, which is quite obvious why. I also feel better about having this regular workout besides my job in an office. So there are both mental and physical benefits. So now I'm just curious: What physical and mental benefits have you noticed from bicycling/commuting by bike often?
I also wonder about risks I could come to face though. Are there long term risks for my health? What other issues might become important after more months/years of bicycling? And of course what can I do to prevent them from getting bad or happening at all? I'd like to avoid typical mishaps and learn from you guys' experience.