Oct.02, 2009 Health and Fitness Tags : Amp, Competitions, Competitive Sports, competiton, Contractions, Cyclists, Doms, Endurance Events, exercise, fitness, Foot Strike, Long Time, Marathon, men's fitness, Muscle Damage, Muscle Endurance, Muscle Fatigue, Muscle Injuries, Muscles, Onset Muscle Soreness, Pace, Rest Days, Rotary Motion, running, tiredness, Training, Vigorous Exercise, women's fitness Related Posts:Intervals to Improve EnduranceHard-Easy Training Principle Applies to Any Sport or