Hey Alpinerabbit... that sounds... interesting. I can't say that my running coach taught me to shuffle... but if it works, then do it! I see a lot of people with shuffle type of run who are flying by me!
Well, on Sunday I rode 70 miles... aka: 4.5 hours... and then I ran afterwards.
It was a very short brick scheduled though... only 8-20 minutes of running.
I ran 1.5 miles, with a 9:40 minute mile pace. I was shocked! When I got off the bike my thighs were burning so badly. But somhow I pumped out a fast run. Of course, that was my threshold.
"Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather, to skid in broadside thoroughly used-up, totally worn out, and loudly proclaiming: WOW WHAT A RIDE!!!!"