I have not run for a week. I just finished my cross-country season and my winter track season will begin next week. Is this one week of not running going to make me lose my cardio-vascular fitness, my strength, my speed? I am really afraid that I am totally out of form for next week, after everything I had in the last few months! If the answer to my question is yes, how long will it take for me to get back to my form?