It doesn't always feel awesome

Today didn't exactly feel awesome as my wife and I pounded out 3.5 miles. I had to walk twice...once at the 1.75 mile point, and once at about the 3 mile mark. My body felt a little heavy... I'm kinda frustrated that I'm not thinner than I am, but I'll keep pushing on. The no S plan is pretty good, but I need to do a little more if I expect to lean up by 10K time. I feel better of course now that it's over...That's what I believe runners refer to as the "runner's mellow".