I am 52 and walk at lunch time. If I was you I would not leave my house without a small flashlight, pepper spray, loud whistle and a couple band-aids in my billfold. Given that I hike in large desert city parks I take a lot more things with me. We had a fellow slip on a trial at Camelback mountain. He broke his ankle and had to spend the night. They found him the next morning. I bet he wished he had some pain killer on him.
_________________________
Thermo-regulate, hydrate and communicate.