I'm 17 and would consider myself to be healthy i have a good diet and have been cycling for about 3 years. I race MTB and do road riding for training, towards the end of last summer (2014) when I was at my peak i was averaging 120 miles a week. At this point i was performing well in races. Around comes autumn and i get to do less training because of college so i drop down to around 40 miles a week. I slowly noticed a decrease in my performance in the races (this was to be expected). Just before Christmas I couldn't find the time to get out and i came down with a nasty cold which has steadily improved but has been on and off and i am still suffering but only with mild symptoms. So over the Christmas period i did virtually no riding. Only recently at the start of January have I got back into training and i've noticed my legs will fatigue very easily, i've been struggling in my recent races and have been disappointed in my self. Each training session my legs just didn't feel like they were powerful at all, and i could notice them aching just walking up the stairs. I would have a 1 or 2 day rest period in between training sessions as well but that didn't help. During my race today i felt fine for the first lap but then my legs became very tired and i felt like i had a loss of energy, i don't feel out of breath at all i just felt very lifeless in the legs. I ate plenty the day before with a nice pasta dish the evening before and hydrated well that day and the night before the race. I was just wondering if anyone could give any advice, is it something that will go away? Or is it linked to my illness? i was thinking about taking a week off to focus on getting better.