Walking Indoors

This week I have been more indoors because the weather is cooler and wetter. On Saturday it was supposed to be warmer and sunny. It was neither. My grandson and I went down to the river to ride bicycles anyway. We got so cold! He was much bolder than I was. He wanted to ride down to the train tracks because he was absolutely certain that a train was coming. He had to see the train! We went and he was right. We watched one train engine traveling solo and one train engine pulling several cars. I am amazed that God would honor the wishes of a 5-year-old boy and keep him pedaling a bicycle in the cold, damp air long enough to see a train. Way cool.
On Monday and Tuesday I went to the gym and walked on the treadmill, rode a stationary bicycle, and lifted a few weights. Somehow I strained a muscle in my back Saturday afternoon. It was still bothering me on Monday and a wee bit on Tuesday, so I did not lift much weight. I worked the soreness out of my back by walking the treadmill, the elliptical machine, and pedaling the stationary bicycle. My back is less stiff and painful today - praise God.
I seem to have more energy after the workouts. What happens if I get addicted to exercise?