Dotsie, to answer your question, I'd say that I am more sensitive to climate changes. Hotter is hotter, colder is colder. And I can't take humidity. I was in Florida over the 4th of July, and I thought the humidity was worse than the heat. Here in Colorado at 8 pm it is 81 degrees and 42 percent humidity, a perfect time to walk. It's sunny about 300 days a year here, and I don't like the sun on my head anymore. Do you know that walking in high heat and humidity can actually cause migraines and high blood pressure? Best to follow JJ's routine.