I think I am very grateful for an indoor arena. Without it I would have no place to let horses out to. My farm is covered in ice. I sometimes think I'm getting too old for this!
I'm not getting enough outside stimulation lately. I'm getting plenty of blood-pressure raising stimulation, but my mind is stuck in a rut of difficult work and unpleasant news. I know this will pass eventually.
I have an opportunity to get out this evening and I think I should try hard to take it! It would go a long way to helping with the prior problem.
It's very important to have diverse stimulation for the brain.