Went 40 miles today. I don't have a HR monitor but i recite sentences to check how much i am working at the moment. Was hitting 24.7 mph and going 22 mph for 10 miles and was at less than 85% max HR. Did 15 miles in 45 minutes which for me is a first. At no time did i have to gasp between words. The highest speed was 29.7 mph. Bought a computer last month and it is helping a lot for my improvement. Sunny, windy and 74 degrees. Felt really tired last Thursday and Friday like i was out of power. I hope to keep those days to a minimum. I chalk it up to being 65.