Tru,
It is the heat, humidity, age, and health. My doctor told me to stay in and not work out in this heat at all but I have to as nothing gets done otherwise. I did mow the yards this morning and then had to just quit as I am about ready to collapse. I don't even feel like being up to tell the truth. And I still have 3 rose bushes to go, and that upper lot and out front to mow. But not today.
Ron