How Cold?!!

I recently came across an article about an Australian research project that has determined that temperatures below 10 degrees Celsius are harmful to one's health...

I was confused... 10 degrees Celsius is 50 degrees Fahrenheit... which, here in Canada, I would consider balmy weather any time of the year.

Until a few years ago, Terry would set the thermostat at 56 F daytime, in winter, and 52-54 degrees at night. We did sleep under a warm duvet and wear several layers of warm clothing indoors during the day - a long-sleeved T-shirt and a sweater - but nothing "excessive," in my opinion. (No coats, hats or mitts indoors.) Now, in our older age, we sit a lot, so we've moved the thermostat up to 62.

But according to this article, at room temperatures 50 degrees Fahrenheit, ones blood starts to thicken, increasing one's risk for strokes and heart attacks.

I think about our early years in this house, when we needed to save money to cover all our bills. Terry used to turm the heat OFF overnight(!) and gradually increased the thermostat in the morning... i remember, on occasion, seeing my breath in the morning before the heat was turned on. 

This is how the kids were dressed to play indoors. For naps the babies wore several thick layers of hooded sleepers and had rosy cheeks. But we were all healthy.

Perhaps there is a danger in quickly going from extreme heat (sweaty hot summer weather in Australia) to 10 degrees Celsius/50 degrees Fahrenheit. This is what is happening in the experiment. 

Is it possible that going from outdoor heat into air conditioned spaces in summer is really what's harmful to one's health...??