On the side of the shower opening that will support the door, hold a jamb piece against the wall so that its lower end fits into the base track. Without moving the track, use a 4-foot level to adjust the jamb until it's plumb. Stick a pencil through the jamb's screw holes to mark the wall.
I was asked to answer, so I'll give this my best shot, please know that I do not have any specialized or trained medical knowledge, only practical experience from Ashtanga yoga and meditation. So, yes, walking does reduce anxiety. 1.
Walking is a great aerobic exercise. It works muscles in a different way than running and the impact to your body is greatly reduced. The key is to make sure your pace is fast enough to get your heart rate up. This can be difficult if you are use to running or a faster paced exercise.