I didn't do well on yesterday's training run - seriously ran out of energy. Only ran about an hour + for my 2 hour training run -- and walked the hills which is completely not like me! I've been fatigued, back ache, had difficulty catching my breath, and have a constant low grade headache. While fatigue may be cause by just a very little bit of over-training, the remainder I believe are a result of the antibiotic. So...today I'm taking what I believe to be a well-deserved rest day!