4 mile run, strides, circuit training

Today was a nice Spring day in Portland Oregon with a temperature of about 60 degree F and sunny. I wanted to get outside and absorb some sunshine. I started with an easy 4 mile run. I found a nice stretch of soft grass and ran 10 x 100m strides. The last 3 I picked up to 100% effort. I felt like I was flying. It is definitely fun to run on the grass and energizing. There may even be some scientific evidence to back up my claim that running barefoot on grass is energizing. After all, when we run, our brain emits electrical signals to fire muscle cells. After working in audio and electrical circuits, it is always important that electrical circuits are grounded. Maybe there is some truth to my statement? I finished with 50 knee high plyo jumps ,10x4 sets of pull ups, 3x30 pull ups, skipping, and some other exercises. http://www.foodmatters.tv/articles-1/walking-barefoot-might-be-an-essential-element-of-good-health