I should note that I have a history of over-use injuries. In the previous 2 years, I have had a case of posterior tibial tendonitis in one ankle, anterior tibial tendonitis in the other ankle, and a strained abductor hallucis muscle. One of my goals this year was to avoid such injuries. None the less I developed something in my right calf in in June that I could not self diagnose nor did I seek medical advice. I took some extra time off to help it heal and I am pain free currently. So yes, I think I have been approaching my limits.