Smurf:
Porper: I offer you a challenge: I've no doubt that if you're not presently into exercising regularly, you would indeed feel somewhat tired if you ran 30km a week. But I promise you - unless you are seriously overweight or have some medical condition which precludes exercise - if you start by walking three or four km per day, gradually increasing your pace, and each week adding a couple of km, in six months from now you will easily be able to complete 30km per week, either walking or running, with no difficulty at all. All that's required is some good shoes, a positive attitude, and the commitment to give it a determined go.
How about it?
Julia