Got the to treat myself to a run the Riverparks paved trails along the banks of the Arkansas river in Tulsa. This is a great place do do speed work. Flat smooth trails that go forever along the river. Lots of runners and bikers along the way. Often I never see anyone on my trail runs. Lots of nods and smiling faces today. The wind at my back going out and a strong headwind coming back made good resistance training. I was nervous as I always am when speed/high HR zone work is on the agenda. Will I be able to hold the effort for that long? That many times? And then once I get going the fun of the challenge.