Hi, Im a 17 year old runner and as its been along hard year my coach said i should take a bit of time off to relax. I was given 10days of to chill and hang out with friends. Now that time is up I have just started back. I have been running for the last three days, running for only 40mins each day at roughly 6minute mile pace. I am feeling strangley tired and finding the running pretty tough. Surley I havnt lost a great deal of fitness in ten days?could there be any other reason for this tiredness? Its not like im doing too much as before the break I was training 6days a week!