I started racing last year with just a handful of races. Three weeks ago I raced for the first time this year (cat5) and have been training hard since. Last Thursday I worked very hard for about 90 min on intervals and since then my legs have been really tired. For example, I rode Sunday and my legs were burning and weak but my heart rate was only 135. I have also been dieting by focusing on protein instead of carbs. I have races coming up this weekend and besides just resting, I would like to hear suggestions to help speed my leg's recovery (o yeah....and I'm 47).