1.  You may be suffering from exhaustion.  Running 6 days is a lot to ask of your body.  The vast majority of the training programs out there that I've seen do not have runners doing that many runs.  You might want to add an extra rest day or do some sort of cross training.  Rest is good. It's how our body rebuild and recover from all of the pounding.  Take a look at Hal Hidgdon, Galloway, Furman, and Runner's World training programs to give you an idea of what you should be doing.  I guaranteed you that 90% of the people who show up at the starting line of the MCM do not run 6 days a week for 20+ weeks.   Most people do 3-5 days with cross training days and/or rest days sprinkled in there.

2.  How fast are you running at the beginning of your runs ?  If you run a little bit slower than you normally run at the start of your run and let your body warm up to the run, you will notice that you will feel better at the end of your runs.

3.  Nutrition also plays an important role.  I'm talking about what you eat before you run, during the run, and after the run to recover for the next run.  Are you taking gels or sports drink during your runs ?  Those will help with your energy level.  How well are you hydrating ?

4.  Sleep.  How much sleep are you getting ?  This also plays a role.

5.  You should have a plan of attack for your training routine.  You shouldn't just go out and run 6 days a week for 20 weeks and expect things to go smoothly.  A good training routine allows you to build up and peak around October.  If you are running the same amount now as you will in July, Aug, Sept, and October then you are doing yourself a disservice.  It's ok to run 6 days a week but you have to build up to it instead of jumping in 6 days a week right away.

6.  Find a training plan.  There are plenty of free ones out there on the Internet beside all the ones I mentioned in #1.  Find that plan and follow it.  Use it as a guide.  It will allow you to know what you should be doing. 

7.  Rest is good.  Rest is good.  Rest is good.  Remember that.  It seems to me like you are not getting enough of that.  It also sounds to me like you are doing too much too soon and your body is telling you that it's a no no.  I have run more marathons than you have fingers.  My body can take a good pounding but if I were to run 6 times a week like you, my body would react the same way that yours is reacting right now.

Three things:

• Welcome Tim! You've come to a good place for help and advice. And we're happy to have you here.

• A bunch of us were at Pittsburgh too, mostly marathon, but at least one for the half and some for the relay.

• I'll echo what the others have said. My first thought was "you're overtraining", running 6 days a week. Are you following the "hard/easy" method, always taking an easy day after a hard day? A number of other things were mentioned that you should review: overall health, diet, sleep, hydration, weather, training methods, recovery from Pittsburgh, etc. All these may have an effect.

Let us know how it's going.

Len

Maybe you need a mental break. Have you tried running different routes, trying different techniques (run fast for 1 minute, slow for 3 or something along those lines) or a training partner or group might give you something new to think about on your runs.

Heart rate monitor should help tell you when you are over training.  All post were very good advice.  If you are running where you heart rate is higher than it should be rest.

Hey Tim, Hope your physical went ok.  One thing I've had to do is seek out Doctors who are also athletes themselves and know what being a runner means.  Even if you're and old and slow girl like me, you are still going to run and not "hang it up" due to a bump or two in the road.  I've been dismissed ( Dissed?) by more than one Doctor so find someone you can trust and develop a rapport with them. Happy recovery!