Tonight's power/speed interval workout kicked my Butt! I was a little disappointed that I couldn't hit my target power watts zone that I had set for myself. I had no problem hitting it when the intervals were on a hill but not on the flats and even worse going down hill. I came close a few times! I'm not sure if I set the target too high, or my legs just didn't have it today or my fitness was lacking? I did give my best and it wasn't good enough. I felt like I could have just rode in high zone 3 tempo ride done just as well? I just realized I had the same effect on my 1st speed/power interval workout. The intervals were too long and I shortened it and had much better results, LOL! Next one will be shorter. At least I had enough endurance and strength to complete distance, so not a total waste. I can't believe how exhausted I was/am from the workout. My sister saw me an hour after the ride and asked if I was OK? 2 more speed/power intervals before my next TT race. 6.5 of the 11 intervals were on hills so it was a great adventure and in retrospect a successful workout! Tomorrow's adventure will be a pleasant ride... be safe out there and enjoy your ride!