Background is 35 years a distance runner with 12 marathons but or course now 52 years old. I took up cycling pretty serious in 2009 and have averaged about 4000 miles riding a year in addition to my 35-40 miles of running a week. So my overall endurance is great but my running speed is just awful. Seems to my training log about 2 years ago I notice I cannot run the first mile faster than 9:30 pace. Then I am ok and fall to my usual 8:30-9:00 pace. The first mile is just a real bear for coordination and getting my running form. Before I started cycling I normally need no warm up and could bang, out of the box a fast 1 mile that was at least my overall average for the run.

Does cycling ruin you running form and legs, and more importantly does it seem to throw off your "firing of the muscles" in terms of coordination? Could just be that after 70,000 miles of running my legs are just not what they once were but just wonder who much cycling has to do with the overall picture of running.

No I am not running at tri but figured someone here knows something I don't.