How much exercise is enough?

Question

I swim three to four times a week and usually do around 30 to 40 lengths at a nice relaxed pace, which takes me around 45 minutes. At the moment this is pretty much all I do during the week as I am a writer and spend most of the day sitting down. I'm not overweight and eat healthily enough but am just wondering, am I exercising enough? Is this a normal amount?

Answer 1

diet-

http://spring.info/

Answer 2

yup seems pretty good to me. keep on going.